Should Andrew Jackson be on the currency?

Yes he was, from about 1910 to about 1928 when the current series of bills came out.

They kept the same picture, but moved his face from the $10 to the $20. Yes he was- from around 1910 to 1928 when the currency was set at its present size and pretty much its current design. When the currency was re-designed, his portrait was moved from the 10 to the 20.