Like a commemorative plaque... "this portion of the WALL dedicated by the wages of Joe Smith who lost his house and went bankrupt due to lack of income but it was worth it in case anyone wanders out into the middle of the desert they will know where to border is so they can turn around before they encounter any racists in red hats."

Their vote had very little to do with logic, so facts don't mean much to them. Even facts like bankruptcy.