Not one day. Why?
If you were to spend some time there you'd see that their culture is one that breeds poverty, mistrust, envy (Prolly all Seven Deadly Sins)
Nothing is done without a bribe.
Everything is needing a "moditha*" to get done.
Here's a fer instance.
Young man wants to marry a young lady ... so does he spend a months wages buying her a diamond ring?
Or does he spend a months wages on bribes at city hall and his church for a legal wedding?
Nope ....
Just a fact of live.
*Moditha= Slang for a 'small bite", the bribes needed to get through life in Mexico (and Latin America).
However, by making Mexico a part of the United States, instead of the influx of Mexicans to the north, you'd see a flow to the south. I believe that flow would drastically change the dynamic in Mexico, as wealthy retirees, businesses, celebrities looking for new exclusive coastal properties, etc., would no longer put up with such behavior.
I grant you that it would take a while to assimilate former Mexicans deep in-country to the new way of life, but it would happen. In fact, I'd predict a massive flow of people, material, and money to the southwest if this were to happen.
-PJ