Joseph, there are also many retired people who actually volunteer for jury duty. In any case, there must be some system. Dinim is one of the sheva mitzvot. It seems to me that you are simply engaging in identity politics (compare your virtual conviction of the Kushners).
Akuperma, as a matter of fact, Abarbanel says that all judges should be elected (Rav Hirsch says only the Supreme Court – they then choose the lower court judges).