First, lets be clear. Only the first year will users be making 100% interest. After that, it linearly reduces down to 6% after 10 years.
And I can tell you why: Because of the rich founders, the rich angel investors and the rich foundations.
Second, simple algebra shows that regardless of the reward percentage, as long as users are mining, the Rich maintain the same, "purchasing power" as you called it, vs the poor. Let A be user A, B be user B, and p equal to the percentage earned. Then A*(1+p)/ (B*(1+p)) = A/B.
Wrong! This formula ignores compounded interest! As shown in
https://bitcointalk.org/index.php?topic=944933.msg11775144#msg11775144 and as described in the whitepaper: Larger shareholders ""receive payments more frequently".
Let m be the number of Blocks solved by rich user A within a certain time frame and n the number of blocks solved by poor user B within the same timeftame. Then
A*(1+((p/m)/100%)^m)
the rich users share increaseswhile
The rich get richer while the poor get poorer.B*(1+((p/n)/100%)^n)
the poor users share decreasesThe only way a poor user (or even a rich user who doesn't mint 24/7) can counteract this inequality is to send his coins to a pool. This will make him dependent on a third party which is the direct opposite of decentralized.
It looks like this is the case (you need to DEPOSIT nokoins to use the pool),
but isn't that dumb? What other coin requires you to
put your funds into a pool to use that pool?
Yes that's dumb.