Without knowing anything on this topic, it sounds like there's a 75% marginal income tax on money over €1,000,000. What that means is that every euro OVER €1,000,000 gets taxes 75%, not that every euro OF someone who makes more than €1,000,000 gets taxed 75%.
Let's say that someone who makes €999,999 pays 450k in taxes. If you make €1,000,000, you don't pay €750,000 in taxes, you pay 75% of the euro in that tax bracket on top of the 450k, or €450,000.75.
Hope that clears the air.
--
senorhousemouse