Non-Doms On Mars

I used to worry that billionaires
might want to populate Mars
because they preferred the atmosphere
to them being too much in proximity 
to poor people, and in addition, in their new
unearthly non-dom status they would be kept
in unearthly luxury closer to their money,
whilst they evaded paying tax more efficiently.

Nowadays my worries are more earthly.
Has Donald Trump done all his homework
with his tariffs? Has he set up his beyond the earth
customs and excise offices corps yet? How else is he
going to collect the tax from the duty free
zone of Elon Musks new luxury travel scheme
for those who can afford to live so far removed
from where they were born, in the nuevo riches?