It's oxidation TAX!
You're taxing people, that's what it is, you want to tax some to keep the miner's revenue up, but what will happen if there are no people willing to move their coins and pay those coins and what will happen if everyone will weasel their ways around?
I mean common, we have had taxes for millennia and just as old there is tax evasion, one area where people exceed is finding ways to avoid it, they will do the same here.
there might be a trade-off among enforcing holders to participate in decreasing the block-chain length and block-size. in other words, when we compress the block-chain by oxidation-fee, then we could increase the block-size on the other hand. so once the idea show its merit, then we could set all these variables to fit in.
Why would this happen and how?