They will try, but if the prices are already high then they won't be able to sell them nearly as easily or gain as much profit.
And even if we abolished scalping and it would bring the prices down a bit, it wouldn't actually solve the issue - like how nVidia noticed last gen that there were enough people that were willing to pay ridiculous amounts for the scalped GPUs, so now they increased the prices themselves to that level. It just made it happen faster than normal as they could gauge the markets easier.