It may be counter-intuitive but just having a "business-minded" guy as president or a "business-minded" congress doesn't necessarily lead to a simpler tax code. In practice, most politicians in either of the two real political parties are actually very similar in their behavior, due to the way our political system is set up. It forces them to respond to pressure from rich people and corporations when passing laws.
And while you might think these rich people would be pressing for a simpler-to-compute tax system, it's actually the reverse. A simpler tax system would likely result in a fairer tax code: instead they lobby for a very complex one with many loopholes by which the rich can pay relatively small amount of taxes, but make it not apparent to the middle-class exactly what is going on.
Maybe my mind is a little different. Regarding the tax issue, there are many that are not suitable, so that many entrepreneurs run away from taxes by receiving high risks.
Thank you for your explanation