Because it’s stupid.
The cost / benefit ratio is off the charts astronomical cost for negligible to no gain. Use the money instead to fund measures that have a proven track record of efficacy. No reasonable person would suggest an open house, free for all style of border security and enforcement. Building a wall as a lasting monument and reminder to one man’s overweening ego and hubris is not the way one’s own legacy should go down in history.
Start with what works and use the five billion bucks for further future investment and improvement. Be someone who can feel true pride for real achievement when looking back at your legacy. Be someone who embodied true leadership. Be a person. A real person. And that goes for both sides of the aisle. #BeBest