Percentage based income tax is the only method that makes sense. The wealthier individuals and corporations can afford to pay more, so they should. A flat tax will lead to decreased funding for the programs that the lower and middle classes rely on. Many people employed by these wealthy corporations are forced to rely on government assistance and social programs to meet their basic needs due to the fact that their employers refuse to pay them a livable wage. A flat tax will only further enable already rampant corporate greed.