Require the nomads to set up a permanent company presence in a country that works for both of you and then hire them as consultants with a draconian NDA. That w

Require the nomads to set up a permanent company presence in a country that works for both of you and then hire them as consultants with a draconian NDA. That way, you can always sue the company and the government will surely keep in contact with the person that is legally liable for paying taxes.