So how much more do you want to pay for groceries?

Also with record low unemployment at some point there just aren't enough workers out there, and crops are going to just rot in the field unless you find more people to do the work. If you just pay people higher wages to try to get people to do the job, then that one extra farm worker is one less cashier, one less cook, or one less cleaner, and now you just moved your labor shortage problems elsewhere.