Tax them at 100% and see how much revenue that brings in. Doesn’t anyone realize that confiscatory tax rates are equivalent to communism, where the government is the only employer and pays you what it thinks you deserve?
There’s a reason why the second plank of communism is “(a) heavy progressive or graduated income tax”.
And yes, the Irish politicians know this well. The pro-EU ones (which seems to be just about all of them, who forgot the earlier fight for “independence”) signed on to the so-called “social market economy” in the EU treaties after all.