Poor people need rail, busses, cars and the cheapest possible power. If the government does not provide the cartels are more then ready to do its job to placate the citizens.
Well: Energy is 54 % of the money. Which is mostly for the industry up north. Renewables are decorative in the percentage.
Rail: 15.63 % - again mostly for the norther industrial zone- and some link ups with the southern neighbours (under the guise of helping the backwards regions down there).
Roads: 13.94 % same though alot of it is also for tourism. But also logistics.
Ports: 7% Sofar its mostly a trade and industry support program- bluntly directed at becoming the usas new industrial heartland.
The problematic part is that most of this infrastructure is private loan based investment in partnership with the mexican goverment. US-companies will own significant parts of the infrastructure down there and thus have a handle on the government.
This is mostly a "re-industrialize" the us plan without having the problems with industr you have in the us.