I'm still having trouble though. I notice that citizens were paying income taxes well before 1933.

"In order to help pay for its war effort in the American Civil War, the United States government imposed its first personal income tax, on August 5, 1861, as part of the Revenue Act of 1861 (3% of all incomes over US $800)." http://en.wikipedia.org/wiki/Income_tax#United_States

I'm trying to figure out the logic behind the redemption as per 12 USC 411 and the 16th Amendment to the US Constitution:
Amendment XVI
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.
Although I think the Amendment was made in 1913 (first 20 year charter?)