A wall does not keep people in the country anyone has the liberty to leave.
If we get the wall, and someone deems it necessary to carve an inscription on it, please don’t repeat the one on the Statue of Liberty. Let’s come up with something poetic that implies must have a work record, a useful line of work, have a few bucks to start up in this country, be healthy, etc.
be willing to work, and no welfare/medical