Who pays the taxes?

Not corporations that's for sure (for more go here). Corporate taxes are less than a third of what they used to be in the early 1950s, when that Socialist, Eisenhower, was the president.

Note also, that Payroll taxes, that are regressive, have also increased over time. The poor and the middle class actually pay for their own retirement. No 'handouts' there. And the decrease in corporate taxes is more or less matched by the increase in Payroll taxes. Tax the poor, not corporations, that has been the rule.