Not sure if these permits H-2A, H-2B, H-1B are "scam" One of the many reasons USA is very successful and "envy' from other countries is because USA relies heavily on 'legal' and 'illegal' immigrants. During Covid, a lot of business relied on illegal immigrants. Groceries such as Napa wine, fruits and vegetables are the job of immigrants with extremely low wages, unsanitary living conditions, etc.
**Politicians (Republicans, Democrats and Trump) are FULLY aware about immigrants bring success to the USA in various forms.
**Article: https://www.propublica.org/article/florida-immigration-bill-farmers-rick-roth
(Rick Roth is a staunch Republican and a conservative member of the Florida Legislature)
https://www.uscis.gov/working-in-the-united-states/temporary-workers/h-2a-temporary-agricultural-workers
https://www.uscis.gov/working-in-the-united-states/temporary-workers/h-2b-temporary-non-agricultural-workers
https://www.uscis.gov/working-in-the-united-states/h-1b-specialty-occupations