This - the H-2B - is one of the ways the permanent illegal population has grown.
Once here on ANY visa, the expiration of the visa turns into a meaningless fact; the person just joins the rest who are here illegally, and does not leave.
Some continue to get work, illegally, in the work-area they had a visa for. Few do that forever as the illegal stay continues. And then, as the once legal then illegal “temporary” workers move on, the cry goes up again to raise the H-2B limits.
To me it is a 100% scam in that (1) it is not and cannot be policed enough amd (2) the polioicans and employers KNOW that and KNOW in the long run it adds to the illegal population.
One difference is that unlike a tourist or other temporary visa, temporary visas like the H-@B are sold to the public as providing legal work for someone “temporarily”, and because of that the public is being asked to give them more respect (as not as bad as) permanent immigration visas or other temporary visas. YET the temporary nature is ILLEGALLY discarded by so mnany, and everyone knows it.
If there were a set of “morals” for politics, I’d call the behavior of the pushers of the increases in H-2B as “immoral”.
Over 75 million foreign ‘visitors’ legally come to the USA each year. No one really tracks whether they leave in a timely manner.