How do you judge whether there is a shortage? The labor market balances, just like every other market. If they can't find people who want to work for them, then increase the pay. I don't care if they are already paying more than the minimum wage. They can increase it from whatever level they are paying. That's the American system. It's supply and demand. If they can't hire people, then it's because they refuse to pay the going rate.
Personally, I don't have much sympathy for that--certainly not enough sympathy to let a flood of illegal workers in to fill the jobs.
Yep supply and demand, and due to 30 years of abortion, there is a low supply of labor for the Amusement park industry and they have to import it from other countries.
I guess we shouldn't import oil to drive our cars using your logic.