The risk, so to speak, is that people will be so fond of communist mode that they'll reject attempts to turn it back off. Any laws for this would be drafted in

The risk, so to speak, is that people will be so fond of communist mode that they'll reject attempts to turn it back off. Any laws for this would be drafted in a hurry under crisis scenarios, so they would likely have many vulnerabilities that could be exploited, ones that wouldn't necessarily exist in non-crisis bills aimed at achieving the same goals. A more concrete example: We could pass a "communist mode" bill that makes everyone's health expenses free (covered by the federal government) during the duration of the crisis, to ensure all covid-19 victims get treated and possible cases get tested so we can trace their contacts and control the spread. Alternately, we could introduce a national health program instead, not a crisis one. As it turns out we've had lots of prototype "medicare for all" legislation already and had debates about it. Upsides to the crisis bill: Potentially easier to pass, because we can tell nay-sayers that it's an emergency measure. Any resistance from industry types can probably be defused in the same way - after all, hospitals are actually struggling revenue-wise right now, so having a steady flow of patients funded by the government potentially helps them. Downsides to the crisis bill: Once people are used to it, they'll be very angry if it disappears. There will be political incentive to extend it. Industry may grow used to the federal money and get familiar with ways to raise prices and make more off the crisis system than they did before. Any actual changes will likely be uneven, on a state-to-state basis or targeting specific groups that can't fight for themselves, similar to how many US states simply opted not to take free federal money to expand programs like medicare to more residents. The duration of this crisis is unknown, so you risk setting your end date too early (and having to fight over an extension, like the debt ceiling), or setting it too late and carrying high expenses forward for a potentially disastrous program. Also keep in mind that it being a mode means it can be turned on or off for political reasons. People on either party could definitely hold the populace hostage through that means, just like how the debt ceiling (and resulting cuts to programs and services) has been used in the past.