Why wouldn't profit margins be rising in a time of scarcity? Fundamentally, prices are how we choose to allocate scarce resources, and if demand outstrips supply prices have to go up until it doesn't - if the companies don't increase prices, scalpers will gladly take the extra profit instead. Also, there seem to be a bunch of key manufactured products like commodity ICs which are only viable at the current price due to the equipment to produce them having been bought long ago, which means that it's only viable to make the investments needed to increase production if prices and profits go up in a substantial and sustained way.