We've heard this argument before in the 1960's with non-caring Republicans not supporting the Dems efforts to get children's food, healthcare and housing paid for by welfare programs. The result was inner cities where the fathers role was replaced by government programs, with perpetual poverty, crime, hopelessness and irreversible dependence.
The Liberals should think of that next time they think it is wrong not to expand government welfare to the middle class with programs like SCHIP instead of just thinking that their caring will solve the problem when it clearly made it worse before.
The beginnings of human wisdom on the limitation of the role of government are in understanding that you CAN do harm with even the best of intentions - which I don't doubt the left do have here...