in any active network you are going to see lost coins; from people sending to incorrect addresses, to people losing their .dat files, etc, so if you have 0 rewards then it essentially means that the currency would be deflationary, and people have no incentive to stake. So all you have to do is have a staking reward that is just high enough to make up for lost coins, the overall supply won't increase but people will still have incentive to support the network. Monero's (PoW) planned tail-emission I believe is designed for this exact situation, I'm sure you could do something similar with PoS.
agree. incentive is required to keep the chain moving.
I suggest the alternative is ...
1. you have coins and want to move them then risk capital if your claim is false. A new feature.
2. observers can benefit from proving a claim FALSE.
3. benefit comes from playing by the rules, and only claiming right if and only if you have the needed requisite to move the chain +1 more block.
4. should the chain stagnate ... then it moves slowly ... (PoW) planned tail-emission are muted as much as possible ... thus low inflation ... more specifically these POS planned tail-emission are released only upon network demands to speed up the chain and act like (PoW) planned tail-emissions. They gear up and down.
5. yes permissioned ledger it is
anyone see an alternative?