For stuff that people need and will buy at heavily inflated prices, sure. But there are a lot of non-essential items that people probably won't buy if the price increases significantly. And for those items, I suspect a lot of stores will just let the shelves stay empty instead of spending a lot of money for inventory they can't sell.
Candy bars for example. They want to charge $3 for a single candy bar now, but no one wants to pay that much so they're selling them 2 for $5.
But retailers have studied that this trick isn't going to last because not everyone wants to buy candy bars in bulk, and they won't spend more than $3 for a single candy bar, which means if it goes any higher they won't by any candy bars at all.
