If a few employers who broke the employment laws with respect to hiring illegals were sent to jail, there would be no need to build more prisons because employers would quickly realize that the penalty for hiring illegals was to expensive relative to the benefit and the practice of hiring illegals would stop. Very few employers would ever need to be jailed. Your argument is nonsense.
People cheat the IRS just like people speed. But a little enforcement by the IRS goes a long way and the vast majority of Americans obey the tax law. A little bit of enforcement of our immigration laws would also go a long way and the IRS could absolutely turn it into a bonanza for the American people. About 65% of illegal immigrants are using fake/stolen Social Security Cards. That means that 35% are cheating the system. That is billions of non-tax compliance and would pay for every bit of the enforcement being talked about. Your argument is nonsense.
Making on-line document checks mandatory would take away the excuse that businesses are currently using to avoid prosecution. They claim that they could not tell the documents were fake. With mandatory checks that excuse would cease to exist and prosecution would become a no-brainer and most employers would just plea bargain and pay the fine rather than incur legal fees in a lost cause. Your argument is nonsense.
Fences work. Only about 5000 people successfully crossed the Berlin Wall in 40 years. In Israel, the fence has cut terrorism by 95%. Our fence would probably not work as well because I doubt we would shoot transgressors but if it cut the problem in half it would be an enormously good investment. Your argument is nonsense.
Just once I would like to see somebody opposed to enforcing our laws make a reasonable argument.
A 2000 mile long fence... now that is nonsense.
Best not to hold your breath.
They don't have any.