Prices and profits guide individuals to make better decisions about how best to allocate scarce resources. I will use such information to determine how best to allocate my time and other scarce resources at my disposal. And as long as I or my assignees bear the costs and benefits of my (our) decisions, I (we) will carry out those decisions as directed by existing relative prices and profit opportunities. Should I fail to provide others more value per dollar than what someone else offers, I may find myself out of business. This makes me vigilant when deciding how to spend my time or how best to employ the resources at my disposal.
Market capitalism is not perfect, nor can it ever be given the knowledge and information problems we encounter. Consequently, there may indeed be a limited need for government to intervene, taking on a role more expansive than the protector of property rights and enforcer of contracts to which it is normally assigned. We all differ on our preferences or beliefs about the extent of this expansionary role, but things like provider of national defense, funder of education for the masses, a social safety net, and provider of roadways are common examples of such an expanded role.
So we have two imperfect institutions, markets and government, and must therefore find that mix of these two imperfect institutions that provide us the least imperfect outcome. Remember, though, the incentives of individuals acting within either institution, private or public markets, are the same - self-interested utility maximizing behavior. What differs is how the rewards are earned by individuals acting within the different institutions. For right or wrong, market participants use persuasion and inclusion to elicit cooperation; politicians and bureaucrats use force and exclusion to elicit cooperation. Think of Fed Ex versus the U.S. Post Office. Social security versus a retirement community. Government schools versus private schools.
Firms that produce more value per dollar of input earn greater profits. Those who waste resources go out of business. This is exactly what we as a society want to happen. People who make good choices and serve their fellow man well are rewarded with claims on what others produce, while those who fail to serve their fellow man as well earn less, and in the case if a firm are likely to go out of business. Profits and losses are what discipline market participants, leading them to make better choices and to better promote the interests of others. It is what has led to the great prosperity of the West over the past two to three hundred years.
To the contrary, outside of its limited role, government run by self-interested politicians is directed to save and prop up those who make poor choices and who should instead consequently suffer the resulting consequences. The defense typically is that market capitalism is a zero sum game, with those who chose well "winning" at the expense of those who make poor choices, the "losers." Consequently, proposals like taxing the rich to give to the deserving poor are put forth to rectify some nefarious wrongdoing. Given this mischaracterization of both the process and the incentives of market capitalism, it is easy to defend this bailing out of people who made poor choices. "Hardworking people whose only fault was to play by the rules." Nowhere is it described as for what all this hard work was expended. "Were it not for this recession (a market failure) or this unfortunate turn of events over which this company had no control, it would be prospering." GM is the current example de jour, as are derelict homebuyers and flippers.
The list is long: welfare, corporate subsidies, farm subsidies, tariffs and quotas, social security, subsidized education or healthcare, earned income tax credit, loan guarantees, and every single bailout we've seen the past eight months. This is not to say all of these are necessarily bad or even unwarranted, but to reinforce that most government spending today is largely intended to insulate people from their past bad choices.
Market capitalism cannot survive in this environment. If those who make poor choices know they will not suffer the consequence of their poor choices, the discipline of the market fails and we end up with what we are rapidly descending to now, which is fascism, or worse yet, socialism. Politicians and bureaucrats will then decide on who will win and who will lose, and it will definitely be a negative sum game, not even a zero sum game. History is abundant with such evidence.
Whenever it's stated that we've tried market capitalism and it didn't work, it must be asked, if this is so, have people been properly rewarded for their good choices and made to suffer for their poor choices? Were those who regarded education a nuisance and therefore something to reject allowed to struggle with their poor choice to not become educated, or have they routinely been bailed out? Are people who failed to save forced to live by this poor choice, or does the government step in to insulate them by further subsidizing their irresponsible lifestyle? If a firm routinely wastes scarce resources by producing stuff that is not desired by many allowed to fail, or is it afforded government loans that no private entity would ever consider or protection from more viable competitors? The list is near endless.
Market capitalism works, we've just never had the political will nor the intelligence (yeah, I know that this is a redundant phrase) to permit it to work as it should.
Update: I am not implying here that government acts only to prop up people who have made poor choices. But politicians advantage themselves by convincing people they have been victimized by others, and then pledge to rectify that wrongdoing if elected. Consumers are victimized by greedy gas companies when prices rise. Taxpayers are victimized by AIG employees who pledged their allegiance to the company in return for bonus payments. Union members are victimized by importers and their foreign producers. There is much to be gained politically through this agenda.
Unfortunately, what results is that instead of serving its purpose of protecting potential real victims from perpetrators, the government takes on the role of stationary bandit, thus becoming the victimizer itself. It takes from those who, while acting within the constraints of law, served more people to greater advantage in order to give to those who served society's interests least. Markets cannot function well under such circumstances.