Build a greater Great Wall.?

Ok, instead of our horribly ineffective method of rounding up and deporting illegals back to Mexico, only to have to round the same ones up six months later and do it all again, why not take a page from the Chinese and conscript them to build a wall? Make it twice as great as the great wall in China, and cap it off with gun towers. Even better we could bury the ones who die during construction under the wall to deter future illegals from try to sneak in.