There is no way it would be effecient to perpetually store 1000X your regular demand just to upsell in an unprecendented crisis, regardless of price gouging policies.
This is true, but it would be just as true whether you did it in a free market or through some government program because the inefficiency comes from having to make and store that stuff. A free market just gives us more ways to quantify that inefficiency.
This is super predictable behavior in storm areas like Texas. Hurricanes come, everyone goes for gas, places start to run out of gas, nobody can raise rates, they run out of gas. Even a double normal price could easily pay off a much larger tank.