morpheus,
While pondering this topic this morning I suddenly realized there is a fatal flaw in your plan as stated. I'm very sad to have to point this out, because I really want something like this to work because it is so beautifully simple.
Your plan to destroy coins will not work as stated. You are right that destroying coins will give people incentive to not transfer them between wallets, but they will simply sell whole wallets loaded with coins instead. Once some people start doing this, anybody transferring the normal way will be at a disadvantage, and everyone will have to start doing it, then *poof* you completely lose all control over reducing the coin supply.
Personally, I have to return to pondering the hideously complex ideas in my proposal for the second bitcoin whitepaper for now, but I'm hoping you have a good answer for this because I liked your idea better.