Also as Dan said it is only a psychologic incentive because in reality you don't get any benefit from locking up your steem power. (not suffering from inflation is not a benefit)
I agree with this. But, still, you don't suffer from the inflation. So you have a position that is basically a fair bet on the platform like any other crypto token that isn't hyper-inflationary. A forced long-term position, but still a viable position potentially.
I'll definitely bring your idees to the attention of the devs if I ever have the opportunity to discuss this sort of thing with them. Understandably there isn't generally a large appetite for major changes, but the more their ideas are apparently rejected by the markets the more there could be some receptivity. Maybe (in fact there is often a tendency to dismiss short term price movements as not indicative of much of anything, and there is a lot of validity to that).