High taxation doesn't logically imply that it's necessarily unrewarding to become an entrepreneur but rewarding to be a full-time employe. You can have high taxes for entrepreneurs and low taxes for employees, or high taxes for both, of low taxes for both, or high taxes for employees and low taxes for entrepreuners.
A lot of high-earning individuals are actually using the lower tax rate of corporations to lower their tax rate. If you look at a graph of tax rate versus income, it slowly increases, but after about 60k/year it becomes possible to lower the tax rate using tax palnning.
1. http://liljat.fi/2011/04/isojen-puolueiden-aanet-menevat-kan...