Pretty marginal change of 4.4 % considering the top marginal dropped from 50 to 28% before creeping back to the 35% it stands at now. And its my opinion that most of that 4 points is because they brought back the cap gains tax as a loophole.
And I still don't know how you can compare a flat tax with income capping (FICA) to the progressive income tax schedules (which I've already supplied the data to show). The FICA impact is CLEARLY regressive and needs to be changed. (as stated above, the income limitation needs to be raised or eliminated) To include it in discussions of general wage taxes, though, doesn't make sense. Remember Gore's "lockbox" speech? Its a separate tax going to a separate fund to serve a separate purpose. (in theory at least :-/)
And again, there's a strong argument to support that the burden on the less fortunate is justified because they are also the largest beneficiary from the program. This is where I think the burden should be shifted..and the rich should not see limitations of FICA contributions..and that boost to the SS fund would help rescue the system. Also, I believe there should be an opt-out to allow someone like Warren, who has no need of Medicare and SS, to opt out of the benefits completely..forfeiting his contributions for the greater good.