Yes, there are some landscaping companies here who hire illegals. They pay $10 per hour. The city pays $8.41 including benefits per hour starting wage for parks maintenance.
How high should wages be? Lawns are mowed at average $25 per yard.
I and my son are totally against hiring illegals, as I said, he won’t even hire green card holders.
I live in a different area than he does. I see constant posts on FB of people desperate for work, will pull weeds. When I call them out, they give me an estimate of $400 for four hours of work. That is not reasonable. The one I did hire did a poor job and quit half way through because it was “so hard”.