That's a lot of what prioritizing slots by pay does: pay is higher for jobs with low supply relative to demand.
Also there are a lot of parties involved in gaming the complex system whose services wouldn't be needed if the solution was that simple. I think Upton Sinclair's quote applies here. https://www.goodreads.com/quotes/21810-it-is-difficult-to-ge...
The process is completely divorced from reality.
The questions and requirements are meaningless.
To my eye, there is zero rationality in the process.
As far as I can see, the and the only effect of the visa programme is that there is a limited number of visas, and so this acts to prevent businesses from hiring the people they want to hire, and that's not freedom; and in the process of doing so, causing untold disruption to lives and businesses and direct and indirect costs to businesses, individuals and economy as a whole.
I would also argue that prioritizing the highest paid jobs makes displacement of US workers less likely. It would raise the bar for everyone.