Sounds like a good idea, but knowing how our court system operates the people who get prosecuted for hiring illegals won't be the people who hire dozens of illegals (like the wine industry and hotel industry). The people who get charged will be those who have an illegal watch their kid three days a week so they can go to work.
I'm not saying that people who have a landscaper or a janitor who come in a couple days a week or month are doing the right thing, but if Mr & Mrs Jones is going to be prosecuted for having an illegal do their laundry, then for damn sure Gallo Winery better be prosecuted for having thousands of illegals
picking their grapes....
Many are ignoring the problem of forged documents. I was an employer in California until 12 years ago. I was virtually certain I had illegals on my payroll, but they had "green cards".
Perhaps things have changed since then. (Is there now a system for an employer to check for forged credentials?). But I suspect it's gotten harder, not easier.