That’s a collective action problem. You can’t get everyone to pay $1 more. If your strawberries (for example) cost $1 more per pint then your sales will drop accordingly. It doesn’t matter if all strawberry farms agree to pay more to their strawberry pickers. You aren’t only competing against other strawberry farms, you’re competing against all other food. If strawberries are too expensive, people will eat candy or potato chips instead.
But the market will always find the place where the work is unbearable and stop just shy of that.
You underestimate the percentage of the income some people spend on food. That's why agriculture is heavily subsidised.
In 2019, California agriculture produced about $50B in receipts, with almost $22B in exports. Our water goes with those exports too.
Now, that kind of nationalism is very uncalifornian.
My original point is that even though we produce a crazy amount of farmed goods in CA, we still import things that we grow here and export. Always seems odd to me to see produce from Ecuador in the grocery store when I can buy better quality down the road from a local farm stand.