As much as I like embracing the statement "Don't let the perfect be the enemy of the good" I think we really need to solve tax havens before we can make more places that can serve as them.

The simple solution to me is that a country offers good value for the taxes people pay to it.

Then people and their taxable assets will gladly stay.

The problem is once you have the kind of money where tax havens become a priority, you no longer need anything the government might be able to provide. And then the game just becomes collecting as much money as you can and preventing that money from flowing through the economy by shuttling it out of the country.

The “good value” should hopefully be a well functioning nation full of healthy and happy people. Unfortunately that’s not the goal of most people with that kind of money.

This - although easier said than done in a liberal democracy.

Solve them internally in your own country instead of the near-impossible task of trying to bend the whole world to accommodate your interests.

Actually, I emigrated - I now live in a country with more rigid tax laws and left the US behind. This is somewhat of a salve, but we live in a post-globalization world, cleaning up your backyard doesn't mean anything if your neighbor's sewage is leaking under the fence.

Huge tax loopholes being accepted by central world players like the US puts pressure on smaller countries to accept them as well.