Government 2.0: Decentralized currency with built-in tax, currency holders decide what entity gets their tax revenue, entities (essentially second-layer governments) compete for tax revenue in exchange for services.
Agreed. There should be a default. Perhaps if you don't pick an entity, your tax goes into a pool that's then evenly distributed to all holders. That also puts pressure on the entities to provide services that are better than simple programatic redistribution of wealth.