Nxt Monetary System (experimental version released to tesnet in the last 24 hours) will go a long way to solving this problem. This is the Nxt implementation of Sidechains.
There are a selection of properties (reservable, mineable, non-suffleable etc) that can be combined. Initial properties will include for:
Crowdfunding
Shop Discount Vouchers/Tokens (can only be transferred from and back to the issuer account)
POW (on top of a POS currency)
Inflation (allow creation of more shop vouchers, dividends, currency)
The possible combinations could see some interesting experiments in crypto. Further properties can be added to Monetary System as the scene develops, if there is a need. It will be interesting to watch.
Monetary System Documentation >>>
https://bitbucket.org/JeanLucPicard/nxt/issue/205/monetary-system-documenation