Remember, though, that 50% is the marginal tax rate. I don't know the tax brackets in Norway, but only income over X amount will be taxed at that rate, the first X will have a different (series of) lower rates, and generally the first Y amount has 0% tax, for some small-ish Y. This means that his amortized tax rate is less that 50%, maybe even much less if income is only a small amount over the X threshold for 50% tax.