All Marxist/Communist totalitarian regimes build walls with barbed wire to keep their slaves inside and subject to torture, rape and brutality while working to keep the beast functional.
Ours is a slight anomaly where the border is wide open COMING IN.
But then, the regime intends to replace the existing White Middle Class with the third world diseased illiterates of South America.
My first thought was that it sounds like he’s proposing the creation of a financial Berlin Wall.