Social Security started at like 1%...("you'll HARDLY even notice it")...every few years, TEENY ("you'll HARDLY even notice it") changes have been made, until we arrived at our current 14% or thereabouts, and we've got some folks on left saying the poor should be exempted from even THAT; (the 'tax-breaks for the rich mantra was partially correct, as those with families making 30ish really dont pay any taxes other than FICA, in the end, and thus received no tax break;)
The actual rate when the INCOME tax first started, in WWI, was like 3-4%? mebbe one of yall can hunt that up, and it was supPOSED to be temporary--like, until the war ended. When Reagan's first term started the top earners were paying 70% (of the income they couldnt hide from the gov't, and thus from the economy)---There is NO reason to think our elected pimps won't do the same damn thing with a flat tax, except we will have already given away the few deductions we now have.
BTW, in either '84 or '86, Reagan cut a deal with congress--MANY deductions were given away (first and foremost interest on credit cards, etc.) in exchange for lower rates. Bush I and Clinton took those cuts away, and we never DID get those deductions back:mad: