a) you could have a mandatory one time cost that reflects the average likelihood and cost of them using it (ie up front insurance) b) the US is already filled

a) you could have a mandatory one time cost that reflects the average likelihood and cost of them using it (ie up front insurance) b) the US is already filled with "poorly integrated" people, the whole country was founded on immigration. The only way you'd necessarily be treated as "second class" is by not being eligible to vote, which tourists also aren't and they don't seem to mind much. The specifics of what to charge and what to demand are obviously flexible, but to me the net positive seems pretty obvious.