Stake modifier, omission of coin age in combination with NoKoin's initial 100% p.a. reward is an insolent rich-get-richer-poor-get-poorer-scheme!
Small NoKoin holders do not mint 24/7. Coin age doesn't linearly accumulate over time. --> Rich NoKoiners receive much more because they stake more often + due to compounded interest.
Rich foundations, rich founders, rich angel investors --> probably a feature.
Compound interest is necessary in order to prevent miners from staying offline most of the time:
http://forum.neucoin.org/t/technical-questions-and-clarifications/531/51