I actually think there is an answer in the previous thread makes sense.
About your question:
Yep, nobody wants to sacrifice their own interest to pay for others’ bill. But the Proof of Importance system itself is a system encourage spending. But if the richest see no incentive to spend and boost their importance score, then who will spend?
So you gotta to have some magical formulas to meet the spending demand. I think the dev team shall think hard on this.
But I think, maybe introduce 5% of inflation every year, and big spenders get more rewards from the inflation?
Do you think it makes sense?
In the Ethereum world, it’s currently working like this: I invest my ETH to get other tokens, and if other tokens’ value rise, I use the tokens to buy back my ETH from the miners. Buying back ETH from miners is critical, because if I buy back the ETH from ethereum founders, they will rise the price, and I will never have more ETH than them.
In the NEM world, it shall probably go like this: I invest my XEM to get other mosaics, and if other mosaics’ value raise, I can use the mosaic to gain back my XEM from the new issuing inflations. Gaining back XEM from inflations is critical, because if I sell mosaic to get XEM from the supernode holders, they will rise the price, and I will never have more XEM than them.
The game has to be designed like a fair game. At least, it’s fair in theory.