If you don't read Bruce Schneier's blog, I strongly recommend taking a look. His expertise is in cryptography and technological security, but the real beauty of his blog is the way he relates the principles of security to other fields.
I was particularly intrigued by his recent post on self-enforcing protocols, which are systems which can function without a third party acting as an referee to prevent cheating or resolve disputes. He highlighted self-valued property taxes as one example of a self-enforcing protocol.
This is something I've touched on previously. The way the system works is for each homeowner to value their own home, on the understanding that, if somebody else offer to meet the valuation, they will be obliged to sell. The tax is then levied as a percentage of their valuation. It works as a self-enforcing protocol because, if the householder deliberately undervalues his house in order to reduce his tax bill, he risks having to sell the house for less than he really thinks it's worth. Whatever you think of the tax itself, it should be clear that the methodology would avoid the risks of corruption, valuation error and dispute which are a feature of other methods of property tax valuation.
What I hadn't realised before reading the article is that the Greek government has used that type of system for taxing antiquities, so there is some recent experience of it being used in practice.
Schneier is also the originator of the Individual I campaign, which calls for greater respect for individual rights, something I find very refreshing coming from a security professional at a time when governments increasingly try to use security as an excuse to restrict individual rights.