As others said, UBI doesn't necessitate increasing the stock of money, it's a system of redistribution. The types of goods being consumed by the economy as a wh

As others said, UBI doesn't necessitate increasing the stock of money, it's a system of redistribution. The types of goods being consumed by the economy as a whole would change, you correctly predict (if they didn't, UBI could hardly be called a success in redistributing money to the poor, could it?). Luckily, one thing capitalism does have going for it if nothing else is that it encourages a rapid response to changing demand. There may be a period of time where the grocery store aisles are leaner than usual, so to speak, but I don't see why we wouldn't see our usual swift return to equilibrium.