I don ‘t believe Paul used the word “most”. That was you.
How about "any"? Does anyone believe that "any" of these people are motivated to crash the border because of TX college tuition discounts? That's just a hollow argument. They're coming for the free stuff because a shack in San Diego is a mansion next to their old home. And trust me, there are tons of shacks going up in San Diego.
And I'll go even further. They don't have any lofty ambitions to get an education or start their own company. If they get their kids in an American school and are able to buy a 50" tv, they're golden.