On a smaller scale, sure. You might have a Chinese restaurant employing half a dozen undocumented Mexicans, for example. But on a macro scale? Who are the people making MILLIONS off of it? Remember when Tyson Foods got busted back in 2001 for smuggling in people from Mexico to staff its chicken processing plants? Remember Trump's original pick to be Labor Secretary, Andrew Puzder [[CEO of the Carl's Jr. restaurant chain)? He estimated that as much as 40% of his restaurant workers were undocumented and were working under phony social security numbers. Donald Trump himself used 200 illegal immigrants to help build Trump Tower in the 1980's [[and then stiffed them on their full pay).
Here's an article about how major companies like Target and the H-E-B grocery store chain in Texas simply sub-contract out to firms that they know employ undocumented workers.
https://www.texastribune.org/2016/12...migrant-labor/
Call me crazy, but I don't think it's Mexicans who are running these major corporations.
Put someone like Andrew Puzder or Donald Trump in prison for a year or two for knowingly employing illegal workers and you would see things change. But people like Puzder and Trump don't go to prison for their crimes and they never will. But that Mexican guy you referred to in your post? I bet he went to prison for a long time.