UN financing

Here is one possibility for UN financing.

In order to forestall problems with property rights over the
solar system the UN owns rights to everything that is in the
Sol's solar system other than Earth.  They also maintain 
research stations in many of the more interesting places.

Any nation is welcome to use the research facilities owned
by the UN with the caveat that the UN is 1/2 owner in whatever
discoveries/inventions are created.  While this is rather 
hard to enforce the UN also gets a cut of anything produced in
space and they also own most of the asteriods which are used
to supply resources to Earths industries.  Mars is also used
for many industries which require gravity but are too 
ecologically damaging, which often include things the politically
influential "Green" party thinks is harmful with little or no
evidence.

While the UN has a populace, mostly it is the few people who
choose to live in the inhospitable areas of the Solar System.
These people in general are loner asteriod prospectors or
scientists.

Do note that the UN has little/no jurisdiction over Earth itself
out to geosynchronous orbit.

Sound like a basis for reasonable UN financing while leaving it
as a fairly impartial organization?

Roger