Hmmmmm. I'm not so sure.
There's only 2 tier one clubs in the world where money doesn't matter, us and PSG. And you could argue only one, since unlike PSG, we do actually try to run a sustainable business model which delivers profits, even if we have a bottomless pot of cash to support it.
And neither us nor PSG can go on blowing £200m+ every year and stay in line with the rules. We'd get banned, pure and simple.
None of the other clubs relish the prospect of a huge jump in transfer fees, nor have a huge jump in revenues to support vastly higher spending. So I do not see an inexorable increase in transfer fees happening. This year may well be a high watermark for quite some time.
The other big clubs will definitely be monitoring how the Neymar deal pans out commercially. If he demonstrably generates shed loads of commercial revenue then there could be a step change in the valuation of the very best players. If the deal is a flop then transfer fees will re-adjust to a "normal" level.