My experience was in Juarez. I haven't kept up with things there, but I would be surprised if things improved so drastically.
For unskilled laborers, owning a car, or living in an area where they could feasibly keep a car, would have been a be pipe dream. They had a company bus that would pick up the employees in the morning and take them home after work. Some homes didn't even have indoor plumbing.
The overriding theme of society was corruption. Anyone who had a job with any authority would use that power to obtain bribes, which was their polite term for extortion.
There was a handful of US citizens that crossed the border every day to do some of the higher levels jobs at the plant. As part of their commuting experience, they would periodically get pulled over by the Mexican police. The only reason for the stop was that the office wanted a bribe. The protocol was to hand him your drivers license with a folded $10 bill.
I'm confident that the union leaders negotiated money for themselves, rather than the regular workers. There was even concern that, if the worker pay was too much above other employment options, it would be a risk to the employee. They could get killed by someone else that wanted the comparatively lucrative job.