California is exporting talent while importing Mexico's poverty. The latter is not California's fault; the former is.
But the rest of his column doesn't acheive that level of insight.
I think there could be a case made that a high level of Mexican immigration is only manageable under a Texas Republican-style system of low government spending, low taxes, and low environmental regulation. But there are a couple of problems with that. It assumes a Texas-size supply of habitable land so that land prices don't go through the roof and there will be enough resource extraction jobs, which California really doesn't have even before all the environmental regulations that the beauty of California inspires. And it assumes that there will be enough Republican voters to keep voting against the new poor people's urge to vote for tax and spend programs. And how much longer will Texas have that?