Dear cmp_ancp,
The only justifiable situation could be that we decide to deprecate ECC signature in the future and make use of P2PK coins which cannot be recovered with any rescue protocols (ZKP of BIP32 etc.). Sacrificing the eldest in the village to protect the virtue of 21M cap is far more unfair and grotesque than evenly tax everyone by inflation (possibly net zero or negative inflation).
Speaking of PQ, maybe the transition to PQ signature will make the block space scarcer and we only need to smoothen volatile fee market by 2030s. In that sense, we should stay focused on the PQ transition for now and see what Bitcoin will look like after Q-day. Although any scaling solution or invention of lightweight PQ signature might nullify the elevated block space demand.
I do agree that we have a long way to go to reach consensus on any solution. That is why we have to start thinking about it now.