Bruce Bartlett makes it (and, it being Christmas, I offer no rebuttal)
Republicans are now using the fiscal impasse to try to raise the age for Medicare and reduce Social Security benefits by changing the index used to adjust them for inflation. They know that such programs will be easier to abolish in the future if the number of people who qualify can be reduced and benefits are cut so that privatization becomes more attractive.
This is foolish and reactionary. Moreover, there are sound reasons why a conservative would support a welfare state. Historically, it has been conservatives like the 19th century chancellor of Germany, Otto von Bismarck, who established the welfare state in Europe. They did so because masses of poor people create social instability and become breeding grounds for radical movements.
In postwar Europe, conservative parties were the principal supporters of welfare-state policies in order to counter efforts by socialists and communists to abolish capitalism altogether. The welfare state was devised to shave off the rough edges of capitalism and make it sustainable. Indeed, the conservative icon Winston Churchill was among the founders of the British welfare state.