Earlier quoted context omitted.
What does game over mean in this context?
Game over happens when, fiat money seems to have, on a risk adjusted, liquidity adjusted basis, a better return and better appeal than holding existing real private assets, therefore a process starts where people, businesses and banks try to hoard government paper all at the same time instead of holding private assets. Demand shifts so far towards government paper and away from private assets that the supply of the l…
This is what happened in the 1930s. But as you say, counteracting it is as easy as printing money. Which normally has the disadvantage of causing inflation (this is what they were excessively afraid of in the 1930s), but when there are existing deflationary forces in effect, all it does is even things out.
The real question is, what happens to the money they print? Buying treasuries with it is the usual option, which isn't a total disaster (it pushes investment back into stocks by lowering the yield on bonds), but a better option right now might be paying out the new money as a UBI.
That would serve two purposes at once. One, you fight the deflationary effect, and two, you help people out whose businesses are suffering, both by giving the proprietors a UBI and by giving their customers one as well so they then have some more money to patronize businesses with. So instead of propping up stock prices artificially, you maintain their value organically by strengthening consumer demand.
This also provides a nice answer to the question, what do we do once interest rates are already zero? At that point we can use any additional new money to fund a UBI instead of driving interest rates negative.