Does this double, triple or quadruple costs? Likely not. Yet costs do increase, unless the manufacturer does not increase production capacity to match demand. In which case supply dwindles to zero, with predictable consequences.
The point is: No factory or service provider operates with 10x production capacity they can turn on at a moments notice, that would bankrupt any business instantly.
Perhaps the law we need is one to control hoarding behavior or the rate of change. With that you avoid shocking businesses with unreasonable step changes in demand.