Germany is appr. 50%. Usually you have the option to cover that tax by selling half of your RSUs, Options whatever and keep the rest or by keeping 100% and pay the tax in cash. Kind of fair, especially since you can get part of that tax back with your income tax declaration.

In Australia you pay the marginal tax rate which is nearly 50%, both on acquiring the shares, and (usually) any gains between then and when you sell them.

The article is real poorly written, I can't work out what it's saying the US or EU equivalents are.