The first problem with this is the same race to the bottom you have with corporate tax rates in general. If only one country, the US for example, creates such a law, that would give corporations a massive incentive to create their intellectual property outside of the US. I imagine that pretty much all global companies would gradually move to produce all of their intellectual property outside the US so as to avoid such restrictions. This would in turn be a huge windfall to other countries and a major detriment to the US economy.

So you need all countries to coordinate on this front. I also don't see how the ban would encourage the Caribbean to adopt "sensible" tax rates. In the Bahamas, Bermuda, Cayman Islands, or the Virgin Islands, the corporate tax is already zero. Not sure how much leverage such a ban would actually have over these countries.

The second problem is in the actual legislation. How is the law going to be written? Is it going to be a fixed list of countries that congress must update? Any country with a 0% tax rate? A new FTC style body that adjudicates which countries are "tax havens?" Because all of these can be circumvented with just a little elbow grease.

The final problem is enforcement. Can intellectual property be sold to other countries in the US? Can those companies be sold to foreign companies? If a US company is a acquired by a foreign company, could that company then not license software to US companies? Are all transactions between US and foreign companies going to be individually monitored? Because that is a lot of work, and if you don't do that, it's very difficult to enforce the law.

Basically, if someone was to sit down with the specific goal of designing a tax that could be easily evaded, they would come up with the income tax. Personally, I feel it's better if we adopt taxes that are more easily enforced and more progressive than the income tax. But for some reason, the corporate income tax remains relatively popular with politicians and voters around the developed world.

US has far more leverage than any third-world country. E.g. they could simply prohibit countries incorporated/owning/owned by countries in tax havens from selling in the US. Seems to work well for China.

> E.g. they could simply prohibit countries incorporated/owning/owned by countries in tax havens from selling in the US.

Yea, I don't think there would be anything "simple" about this, for all of the reasons listed in my reply above.

> Seems to work well for China.

We have very different definitions of "work well." I assume you are referring to the recent tariffs, in which case we gave China an ultimatum, and they said go for it, and are imposing retaliatory tariffs.

If China had actually changed any of their trade policies to be more fair, I would have considered that to have "worked well."

What we got instead was a trade war, which was to be expected. Basically ultimatums are always an ineffective negotiating tactic as they force politicians in the receiving country to reject the offer, no matter how reasonable.

> I assume you are referring to the recent tariffs, in which case we gave China an ultimatum

No, I'm referring to the fact that foreign (Western) companies cannot sell in China unless part of the products are made there, and can't own Chinese companies without Chinese co-ownership. It all resulted in a massive transfer of IP to China, simply because for most companies, the tradeoff still made sense (short-term at least) (Google is a notable exception).

Interesting. Comment makes more sense now.

The amount of law and international agreements that would be overturned by such a change is truly staggering, so I’d still say this is the antithesis of simple.

Further, I’m not sure China’s model, and protectionism in general, is a better strategy. No way to know, but I expect China’s economy would be stronger if it didn’t have these protections.

Like I said, there are a hundred things we can tax; why do we only want to tax the one that’s easy to evade?

I’d apply the same logic to everything. I’d also forbid money transfers to/from tax havens and ownership of property/companies by entities in tax havens or other countries that don’t reveal beneficial owners... There’s a lot of abuse happening, and it mostly involves the same few countries. The rest of us (i.e. employees and small business owners) end up paying so much more.

(By “forbid” I of course mean “tax so heavily it just doesn’t make any economic sense”.)