I am shocked, absolutely shocked that the vast majority of economists have been right for decades. Next thing you'll tell me is that limited quantitative easing or government spending increases employment!
The reality is, anyone who knows anything about economics knows that taxes inhibit economic growth.
The idea that this is wrong, is so absurd that it should be laughed at.... only the problem is, most americans are absolutely ignorant of economics and thus can be tricked into believing it. Or in your case, assuming that "the vast majority of economists" think this, and have done so "for decades".
Frankly, it is astounding how much you have rejected economic as a science while thinking the partisan ideology you're pitching is "economics".
Societies are complex systems and managing them efficiently is actually (gasp) quite difficult.
This is _precisely_ the core tenet of conservative fiscal policy. The idea of coordinating any economy of non-trivial size from a central position is a fool's errand and invariably puts drag on the economy.
Sources:
http://www.usgovernmentspending.com/us_20th_century_chart.ht... http://www.politifact.com/virginia/statements/2011/apr/22/ma...