Puhleeze. I seriously doubt that low-end American workers would be sought out to fill the positions of assistant hotel manager and banquet manager (if foreign workers were indeed sought out to fill these positions), and I seriously doubt that welfare could compete with the $ these positions would give to the ones filling those positions.
Then why go through all the trouble of importing people? They’re not saving a dime by importing people for $50k jobs. Let me know when you figure it out.