and exactly why they should be tied to a specific purpose  tie one to clean energy, tie one to cancer research, tie one to seti and astronomy analysis, etc...  Makes a lot of sense to do in so so many ways.

Actually I could eventually see this as a mechanism for allocation of tax dollars.   Bypass the government morons and their pork projects and have us, the people just allocate our "dollars" directly to the projects we want.  Have government budget and spending directly dictated by the people.