The problem with "sharing the wealth" is quite simple
My Wealth---why do I need to share with you?
That's funny, nowhere in the 16th amendment does it state that we have to tell you why. It just says:
"The Congress shall have power to lay and collect taxes on incomes, from whatever source derived, without apportionment among the several States, and without regard to any census or enumeration."
Apparently Congress had broad Constitutional authority to tax income.
Doesn't say you have to like it or agree with the reasoning behind it.
If you don't like the U.S. Constitution, you're free to move.