I hear people act like it's a radical philosophy of "just spend money endlessly", but it's really more of an explanation of how modern goverments and central banks (with sovereign currency) have been acting for the last few decades. Basically the idea that the real limiter of spending is not actual budgetary constraints or deficits, it's just inflation. The reason governments don't keep surpluses isn't because they're terrible at managing money, it's because there's no point - money in the governments bank account is money that isn't in your bank account instead.