“Several implications follow from Hayek's insights into the nature of capitalism.(a) The claim "I deserve my pretax income" is not generally true. Nor should the basic organization of property rules be based on considerations of moral desert. Hence, claims about desert have no standing in deciding whether taxation for the purpose of funding social insurance is just.
(b) The claim that people rocked by the viccisitudes of the market, or poor people generally, are getting what they deserve is also not generally true. To moralize people's misfortunes in this way is both ignorant and mean. Capitalism continuously and randomly pulls the rug out from under even the most prudent and diligent people. It is in principle impossible for even the most prudent to forsee all the market turns that could undo them. (If it were possible, then efficient socialist planning would be possible, too. But it isn't.)
(c) Capitalist markets are highly dynamic and volatile. This means that at any one time, lots of people are going under. Often, the consequences of this would be catastrophic, absent concerted intervention to avert the outcomes generated by markets. For example, the economist Amartya Sen has documented that sudden shifts in people's incomes (which are often due to market volatility), and not absolute food shortages, are a principal cause of famine.
(d) The volatility of capitalist markets creates a profound and urgent need for insurance, over and above the insurance needs people would have under more stable (but stagnant) economic systems. This need is increased also by the fact that capitalism inspires a love of personal independence, and hence brings about the smaller ("nuclear") family forms that alone are compatible with it. We no longer belong to vast tribes and clans. This sharply reduces the ability of individuals under capitalism to pool risks within families, and limits the claims they can effectively make on nonhousehold (extended) family members for assistance. To avoid or at least ameliorate disaster and disruption, people need to pool the risks of capitalism.”

How Not to Complain About Taxes (III): "I deserve my pretax income" http://left2right.typepad.com/main/2005/01/how_not_to_comp_1.html (January 26, 2005)