As conservatives like to say, “If you subsidise something, you’ll get more of it; if you tax something, you’ll get less of it.”
Often it’s argued immigration is needed to fund government spending and to provide cheap labour. This is to say, our current system makes immigration profitable to the powers-that-be. Perhaps the solution to opposing immigration then is to socialise costs for the youngest, make immigration more costly for the powers-that-be. Grant free education, for example: not only public schooling but undergrad, graduate, even medical school. Infrastructure is also stressed by immigration, so a tax could be added here as well. Add these taxes to employers on a per employee basis while reducing the overall tax burden, so that employer taxes are linked with number of employees.
A direct increase in the minimum wage would accomplish the same thing. Yes, unemployment would result; but thwarting immigration is even more important.
In other words, perhaps the solution is to act nearly opposite to what conservatives have traditionally attempted. The justification could be that everyone deserves a fair start in life, and funding could come from a dramatic cut to “defence” spending (which could produce a budget surplus if deep enough.) Americans might be motivated to cut one source of spending (defence) if promised the reward of another source of spending (education).
Traditionally conservatives support “defence” spending and otherwise fiscal discipline. And traditionally conservatives lose. Perhaps “socialism” then is a more promising route.
Regarding the current benefits of immigration: The primary benefactors are employers who acquire cheap labour. Taxes are not increased much by immigration. The notorious Richwine study revealed: “[I]n 2010, the average U.S. household received $31,584 in government benefits and services in these four categories.” And since most immigrants have a low level of education, they are expected to consume more than is paid into government in the long-term, and likely in the near-term as well. So, immigrants are not supporting America’s tax burden much.