Hehe, sounds suave and debonaire, but you won't have buyers, you'll just have "employees" trying to earn your bitcoins at that point ... and we are back to square 1.  I think that is where the "bitcoins are dead" poster is going.  The miners are using technology to become hoarders, and in the end, they will rule just as the bankers do now.

I think that is the real value of some kind of expiry on bitcoins - TO PREVENT HOARDERS that attempt to centralize the market.