In Taiwan, my taxes are quite easy. Tax Season is the month of May. So we go to the tax office to do our taxes. It is about a one-page form that people will help you fill out. It takes about 15 minutes, and then you are done with those taxes.
As countries think about taxes, they really need to think about how this affects the economic development of their country. With more complexity comes more hours spent on taxes, which means more money spent, and less time spent on development.