[MrPiper]

Anfang charges $30 per farm visit and $2 for every animal he shears

Sounds like its time to charge 100/farm visit and 10 bucks/sheep. Its called supply and demand.

[ClearCase_guy]

He works at a fast pace, handling about 160 sheep a day.

Seasonal work that pays $320 a day? Could pick worse, sure. But you could pick better, too.

As you say: Supply and demand. If they need more folks in the biz, they have be willing to pay better. It's not rocket science.