Promising to lower taxes wins over certain voters who believe their taxes are too high and they’re not getting much for their money. Promising higher taxes on the “rich” wins over other voters who believe that someone other than themselves should be paying more because they’re not getting the services they need. Telling the truth wins nothing because people have been conditioned to want what government can’t deliver. The result is a lot of frustrated voters searching for someone to fix the problem.
For insight into why increasing the top tax rate above 40% won’t increase tax revenues enough to pay for new programs, read Side Effects: What Candidates Don’t Tell You, and consider what the real motivation is for candidates telling you this works. To see the impact of dropping taxes below current levels, read Side Effects: What Candidates Don’t Tell You, and ask yourself what the motivation is for candidates to tell you this works.