Hmm problem is social security, if we imagine an income of 100000, it is 20% of 70% = 14000 for income tax + 21,4 of 70% = 14,980, total tax is around 29% after 2 year. So you have total tax 14% first year, then 21.5% second year and 25.25% third year, and 29% from the third year.