Quote from trefoil:
The one thing his theory said was really really simple: save for a rainy day, spend it when it rains.
It's raining.
No, that is not what his theory is. He has an extensive focus on the role of the government to stimulate & influence the economy and also justifying government debt for "helping" the economy.
Saving for a rainy day is plain common sense. The fact that you would even attribute a known economist for basically saying just that, is plain silly.