Sounds like a good solution, the key is how to reintroduce the lost coins back into the system in a fair and democratic manner.
Maybe I am missing something, but what exactly is the point of reintroducing lost coins?
Let's say bitcoin has been widely adopted, the wallet.dat containing Bill Gate's net worth crashed (because his misplaced faith in Windows) and there's no way to recover the file; his foundation need this money to pay 10 million children's medical bill -- in another word, there's catastrophic/extraordinary consequence if the money cannot be recovered -- should there be a mechanism to deal with this kind of situations?