The system I described earlier limits the government's ability to become involved in such a role by removing their obvious entryway into the system, the small number of centralized mining pools.  If you think you can fix that giant, central authority attack vector while still using PoW, then by all means, go for it, but I don't think you can personally.  A system based on DPOS is the only way forward that I see currently.

How do I know DPOS is the future?  Because even the government itself could easily use it.  They could do something like make each member of the UN a DPOS delegate, and suddenly you have a distributed world currency.

You can either wait for this to happen, or create a private, non-government run model before they do.