Fascinating question, but really off the wall.
When has the government ever helped one fake their own death, other than to hide the identity of one of their CIA operatives?
Why would you want to fake your death? To collect on insurance? Tsk, tsk!
To escape from the coming tyranny? Hmmm-m-m! Not bad!
I don't doubt it's possible, but you'd have to be damned careful about not re-establilshing links with your past. One of my favorites was in "The Whole Nine Yards."