If we are to think about Bitcoin in the long term, and given Bitcoin's reasonably critical economic mass of ~$5 bil, current temporary block subsidies can be discounted as we consider fundamental questions about how and when to change one of Satoshi's Holy Numbers.
To which holy number are you referring to?
One last question: what's your position on block size limit, never change it or change (in the way you like the most) in the future?