Look at Ebay and you can certainly see that price gouging laws are creating a "black market". $20 for a 6 pack of Kirkland TP, that would work out to $100 for something that costs $17 in the store. Do people pay those prices? Based on completed listings, it seems like at least some people do. Right now there is no incentive to really rush more TP to the market because Costco can still only sell it for $17. No incentive for manufacturers to ramp up production by paying overtime or adding an additional line because they can still only sell it for $17. The surge in demand is only short lived, so it doesn't make sense to invest when you can't pay off that short term investment.
The guy in the Stossel video I watched who bought 19 generators in his home state, rented a UHaul and drove them to a hurricane ravaged area couldn't help the people that needed those generators. Local authorities stepped in, said he was price gouging and impounded the generators. So no one got any generators. In the end, if it is simply a supply and demand issue, the market should be allowed to play out and let the consumers decide the value of a good or service. If someone doesn't want to pay $30 for hand sanitizer, they don't have to. Of course, this can be said with what is happening with that Costco TP on Ebay.