THIS. Not to mention food supplies will not last that long. Either you're ordering "some people" to keep going outside and keep working, or you're ordering everyone to stay home. And if some people are still going out to stock shelves and harvest foods, then a total shutdown is pointless. There's the added question of power, water and gas and who's going to provide and maintain that stuff. I mean, you cant just order security at power plants to "go home" because there's always some lunatic out there just looking for an opening.
It's one thing to have a month's worth of food supplies, it's another to have multiple months, or a year. You're looking at doomsday prepper level of stockpiling and there clearly isn't enough food and supplies on the market for people to catch up.
Starvation does wonders to increase human stupidity and violence. So I mean, if you want to see millions of people die, you're far more likely to get that to happen via a collapsed economy and starvation than you are via the coronavirus.