Thanks for the post, this helps a lot. As a new user I was not even aware of dead witnesses delegation which does seem like quite a WASTE.
One would think there are failsafes in place to mitigate this effect... or at least make it more evident or incentivized for users to not select dead witnesses. You got a vote from me.
Thank you ! Indeed as I was answering to another post, the problem is known and newer blockchain designs will probably try to tackle it