This will cause "labor abandonment" and put more pressure on the economy. Here is an example --- a company uses a worked for just 1-2 years, sponsors his green card and then fires him. Now if he cannot find a job then if he were on the previous H1B, then he will have to leave the US. However, now, he can stay without a job with no risk of removal, which means he is a liability to the country.
I'm having a difficult time parsing your grammar, so I'm not sure what you are trying to explain.
> This will cause "labor abandonment" and put more pressure on the economy.
There is no evidence that companies are having trouble finding workers outside of Silicon Valley. Precisely the opposite, they are laying off people.
Companies don't fire a person who suddenly has a green card. That person voluntarily leaves for a better job.
And that exactly defines the problem and why US citizens, in general, hate the H1-B program.
The solution to the H1-B program is to transition H1-B's to green cards in 12 months. The company sponsoring the H1-B is responsible executing the paperwork, background checks, and posting a bond to fund the spot checks, investigations, etc.
H1-B sponsors will drop through the floor. However, companies that genuinely want the specific person will continue to be just fine.