And that's what Amazon is doing. From experience, Amazon's owb inventory levwls and placement are well managed. FBA, well there Amazon depends on FBA sellers. And when Amazon is running out of warehouse space for themselves FBA inventory has to go. Long term and slow mover fees make sense.
I don't think these surcharges are enough to solve the issue, not for Amazon and FBA let alone for everyone else. Not that Amazon has much of a choice so.
I'm by no means expert in logistics, but that's the first idea that popped into my mind.