Earlier quoted context omitted.
Let's suppose you want someone to just watch a parking lot which takes zero skills and I advertise for minimum wage and don't find anyone. Then you show up and say I need an H-1B, yes it's the night shift, but as unskilled labor that's a minim wage job... That's the point of around a six figure wage floor. It prevents people from understating the requirements then bringing in a H-1B. I could just Advertise for a secr…
You're trying to solve a problem that doesn't even exist in the current H1B system. Where are all the H1B parking attendants? Do you really think "parking attendant, needs to speak random language for no discernible reason" is something USCIS can't filter? If it was that easy, Tata would just list all their IT jobs as requiring a Hindi/Bengali/etc. speaker and not need to bother with any of the crony capitalism. Also…
The H-1B program is a tiny fraction of the overall workforce and if you want it to stick around you need to justify it. Saying industry X needs workers for wage Y, falls on deaf ears. No, it really does not because for the most part it get's by without them as there is just not a lot of H1B workers in any industry.
Having said that, at the societal level we can talk about gaps that a H-1B program can fill in the short term. If there is a sudden demand for people in machine learning then giving the US access to a wider talent pool has value. But, at the social level each industry needs to compete with every other industry or your talking about soviet style planned economies which don't work.
How do you separate companies wanting cheaper workers from gaps society is better off fulfilling? Well wage is by far the strongest indicator. If the oil drilling industry goes though a boom and can pay 200k for people working oil jacks for a few years then they should get most of the H1B pool as they may need it more than every other industry combined.
However, as the demand is met internally wages will fall then some other industry may have a larger demand.
Now the US is a horribly corrupt society with groups with a lot of power use it to get more power. Thus, the actual H1B program looks very different from what I described. But, again I am only saying there is a justification for an H1B program with a very strong salary floor not anything like our current system.
PS: Anyway, understating the requirements and advertising a job that's below market rates is one the main problems with the H1B system that's most often gamed. I have seen more than one advertisement for a junior job title with 5 years of experience and a masters degree. Lying on a form is easy, lying with money is harder.