That's the idea of putting a 'worthless' payload up first.
Given 3-6 months, $<1M all-in, and a team of engineers and scientists, it would be quite possible to get something ready to rock. Such an instrument would allow an ever-improving test of solar-system dynamics for many millenia.
If Elon is reading and plans to do something similar again, get in touch ([email protected]). We'll make science happen.
Or, just launch a dense one of these: http://www.landfallnavigation.com/davis-emergency-radar-refl...
It's really sad that the only ways to fund science seem to be charity and war.
edit: to sum up, this would be an efficient economy at scale. Some one with money already puts someone with expertise to good use :)
If you have actual suggestions, please do share them, but taking the mickey out of people trying to figure out the universe on $45k/yr is just mean.