tax rates vs. tax revenues vs. collected tax revenues

How do you decrease the gap between taxes and taxes collected? 

Well, here are some things that don't help:
-giving the IRS the ACA to enforce
-an unnecessarily complicated tax code
-higher marginal tax rates that encourage tax evasion (as well as tax avoidance and less work)

Through its actions, the Left gives the impression that it wants to pose on raising money from the wealthy, while actually getting less money from them. 

One of my favorite questions from the 1980s for Lefties: Would you rather have higher tax *rates on* the wealthy or higher tax *revenues from* the wealthy? The reactions were always fun and fascinating.