The gross social and economic deformities resulting from the intense capital concentration necessary for an industrialized society have to be addressed somehow.
In most of the civilized world, wealth maldistribution is remedied by collecting large amounts of income and redistributing it via socialist mechanisms: pensions like Social Security, free universal health care, education, subsidized public transportation, etc.
The paradigm was more or less invented by Germany's first chancellor, Otto von Bismarck, who was not exactly a flaming liberal.
In this country, this extremely rational and equitable plan for a society has foundered on issues of race and class. The biggest complaints that tea partiers have about the taxes they pay arise from their belief that their money is going to people less deserving than themselves.