The problem is likely that they have no leverage. If they were a company owner employing hundreds or thousands of people, with the power to fire them all and relocate, I'm not sure they would see the same outcome.
One must remember that (cross-border) tax law is highly ambiguous. Since you can arrange your own affairs in the most tax efficient way, everyone always tries to get a beneficial outcome. If you add an international component to that, you'll quickly end up in situations where there often is no clear right or wrong answer because tax systems don't look at certain things in the same way.
Spain isn't the best place to live if you have money, in particular due to the wealth tax.
One must remember that (cross-border) tax law is highly ambiguous. Since you can arrange your own affairs in the most tax efficient way, everyone always tries to get a beneficial outcome. If you add an international component to that, you'll quickly end up in situations where there often is no clear right or wrong answer because tax systems don't look at certain things in the same way.
Spain isn't the best place to live if you have money, in particular due to the wealth tax.