It would be impractical to stablish an inflation rate based on an unknown number of inaccessible wallets; one solution would be for users to set a trusted recover account, to where the funds will be sent after 'x' time of it being inactive.
The stupid solution to that is the argument you can go 10 digits behind the comma but at that point, what's the real currency? Bitcoin or satoshis?
It's all Bitcoin, divisibility is one of the requirements for good money. The thing is that it doesn't need to be the currency, but the monetary base in which the whole ecosystem is baked to.
The thing that seems to be broken is the way Steem is created/distributed, we can't expect growth from inflation/printing, it's never worked in our history since ancient empires.
there's no difference between 21 million bitcoin divisible by 0.00000001s and 21 000 000 000 000 bitcoin divisible by 0.01 but it sure as shit would be easier to use since it would be more similar to what everyday people use.
Bitcoin could keep a 2.5 btc reward per block forever after it reaches 21 million and it wouldn't have a dramatic decrease in value. Inflation isnt the issue, it's unpredictable inflation that is.