If the rich and powerful wanted the fence, we couldn’t stop them from building it. As it is, it’s just something they dangle in front of us to prevent a voter’s revolt.
Just so. And what better way to do it than to design a wall that costs megabillions, angers the environmental voters, and in many places will have to be way back from the border, effectively giving Mexico large swatches of our country?
All we need is a couple of fences, some motion detectors, and some border guards who won't get thrown in jail for shooting invaders.
The Mexicans already have such a system. Try sneaking into Mexico and see what happens to you. If the drug runners and the kidnappers don't get you, the army will.