The report is a uniquely comprehensive and jargon‐free (to the extent possible) explanation of U.S. legal immigration. Contrary to public perception, immigrants cannot simply wait and get a green card (permanent residence) after a few years. Legal immigration is less like waiting in line and more like winning the lottery: it happens, but it is so rare that it is irrational to expect it in any individual case.
And the only thing stopping us from having that economic security again is neoliberalism/conservatism.
Only because they are hoarding their wealth and power, not because there is too many people that showed up too quickly.