Well of course he says that. Mexican immigrants sending money back to relatives is the only economy Mexico has. There's no money or industry at all otherwise.
Hardly, ever heard the term Maquilladora?
My wife's last two cars were assembled in Mexico. (one Ford, one Mazda, and the quality is better than my Michigan assembled Mazda). Toyota also has plants there. At one time the last plant making real VW Beetles was in Mexico. Texas Instruments has long had a plant in Aguascalientes (Hot Waters. :) ) near Mexico City.
I'd much rather buy stuff made in Mexico, where the jobs might keep more Mexicans in Mexico, than stuff made in Red China.
Mexico has no incentive to build its own economy and reform corruption as long as it feeds off the US to the tune of billions each year...and as long as those who might be part of a revolution, give up and head north.
And now most Mexicans want to put in a Communist...