He wants to destroy the net worth of regular people. If people can't afford to make their rent payments, they'll take a second or third job and will work for less money. He wants the average American worker to be as poor as someone from Bangladesh, Mexico, or Malaysia which are becoming manufacturing hubs as china's population ages, shrinks, and needs higher wages.
If it's cheaper to manufacture in America than a place like China, he hopes America will become the new China and become the Hotspot for making cheap products for the rest of the world.
He'll create the conditions that cause people to crash out and commit crimes, jail those people then use them as unpaid labor. It's part of the reason he's trying to destroy constitutional rights around due process, fair trials, illegal search and seizure etc. The goal is to make it so that the ACCUSATION is enough to jail someone. Remember slavery IS LEGAL in America under the 13th ammendment. When most of the population is desperately poor and will work for any amount of money to survive and the rest are imprisoned, that makes America a desirable place for imports.
If he cripples the buying power of the average American and weakens the dollar as more countries exchange their dollars for something else, then it will reduce the demand for other country's products because people here literally won't be able to afford them and the dollar will be a cheaper currency than something like the euro or yuan.
He and his team can have such a stupid idea because they fear no consequences. Nobody has actually checked them so they have no reason to believe the public would ever do anything, especially since you'll have people posting even HERE who don't understand that this man WANTS most Americans to be poor. He wants America to slide into developing nation status while the net worth of the few rich people here explodes through corporate consolidation, asset speculation, and foreign investment. America has shown its too p*ssy to stand up to a fascist even when he's telling them to their faces what he's going to do so what reason would he ever have to believe that they'll do anything to fight back from the overwhelming misery his policies will create for anyone who has less than a million dollar net worth?