Chicago, have you ever heard the term "rainy day Keynesian" ? It is the idea that governments should spend money during "rainy days" and cut back during "sunny days", the only problem is, that the government virtually never cuts back for fear of plunging the country into another "rainy day".
It is alot like modern monetary theory. MMT is basically that principle.
Let me ask if the government did (not if they will) cut back during sunny days would it be a good idea?
Well, I'm not an economics expert, but to my knowledge there are two schools of thought. The Keynesians have the government excersise a (much) higher degree of economic policy. For their ideas to work, government has to be efficient and foresightful and smart.
The other school of thought is the Austrians. They don't advocate much government economic spending, as they believe it ultimately is not useful and that the government isn't efficient, foresightful or smart.
Whether the Keynesian school of thought if implemented perfectly would be better than the Austrian school of thought is not a question I feel qualified to answer. I've heard opinions toward both sides.
I am, on the other hand, convinced that government inherently isn't very efficient, foresightful, or smart on economic policy, and beyond that, I prefer the "inefficiencies" of a free market to the "inefficiencies" of government, as when one happens, people lose their jobs, when the other happens people get murdered or put in concentration camps, or forced to fight (and die) in unnecessary wars, or indoctrinated etc.