Ah, the good old Mexican backhoe.
I am manager at a company that does electrical for luxury items at residences. We do not take a machine in there because it would be easy to hit water and especially gas.
So, we dig by hand, at 18 inches deep, averaging 150 - 300 feet a day in the busy season. One guy, a gringo, called looking for a job. Our market is so niche that it takes a while to train. I had worked commercial, residential, industrial. None of it prepared me for pools. It has its own section of the NEC book. Article 680.
So, first, I informed him he would have to learn under the guidance of the guys we have here who immigrated from Mexico (and one from El Salvador.) When I told him about the 18*300, as we call it, he asked, "You all hire laborers for that, right?"
Nope, we are all the laborers. Even the boss has grabbed a shovel on an out-of-town job. I never heard from the guy again.
So, anyone, regardless of actual ethnic heritage, who is willing to dig must be "mexican." Also, there is technique to it. I thought I was a king dirt bunny and one of our guys bumped me out of the ditch and showed ME how it was done. And he loves his job. He likes doing the digging and helping. And I stayed out his way in ditches. When it works, don't fix it.