Taxing remittances are not the only way to get Mexico to pay. Taxing trade into the United States from Mexico does the same.
Mexico receives $45B more than the USA. They will gladly give up 10% of that to retain the other $40B.
But other methods aside, the author is short a few insights about American retirees and travelers into Mexico.
American credit cards work just fine in Mexico and they can be used seamlessly to withdraw pesos from ATMs there.
So the author is blowing smoke and trying to come up with an angle against Trump’s plan. But reality sets his angle crashing to the ground.
A tax on imports is a tax on the American consumer, not on Mexico or anyone else.