Why are you so adamant that this be incorporated into Bitcoin, rather than a block chain of your own design?
It's pretty obvious that few people (if any) other than you and bji want this "feature".
I think a better dialog would ensue if you would describe what you think is the most likely scenario for Bitcoins in the future. This would include your best guess of their future valuation, and the reasons for your estimated future valuation. As a defender of Bitcoins, you can then justify its current design as much as you want.
What? No. Everybody who bought, mined, or sold for Bitcoins did so because they liked the way it works. You want to change the way it works. If you're so sure that your guess (and that's
all it is) is correct, then why not start a competing block chain with the rules you describe? Actions speak louder than words.
I'm not going to play guessing games regarding the future of Bitcoin. It is however a fact that as the value of something increases, the effort that goes into protecting that thing increases.