You don't even need the government to do it; the thing you're talking about is called repo. A bank agrees to sell high-quality collateral to another bank and th

You don't even need the government to do it; the thing you're talking about is called repo. A bank agrees to sell high-quality collateral to another bank and then buy it back the next day for a little more (the level of interest paid gives us SOFR: the Secured Overnight Funding Rate). The repo market is vast and generally massively liquid; trillions of dollars of funding per day.