It is well known that most temples are in financial straits. These places are open the year round and no baskets are passed to defray expenses. They offer religious schools, bar mitzvah training, funerals and weddings, etc. Prayer books and Hebrew Bibles are furnished for free. Also, we have to pay insurance and for police protection.
Synagogues support the various Jewish seminaries that train rabbis, cantors and teachers.
Without their existence, Judaism would be in serious trouble. Membership in a synagogue guarantees a future for our children. Hadassah, B'nai B'rith and ORT are all worthwhile organizations, but if synagogues go under, Jewish survival is in jeopardy. A moral guide' Law school professors often belittle judges who are afraid to grant needed relief on a seemingly meritorious set of facts because of fear the case will open the floodgates to unmeritorious cases. Established religion provides a known moral guide to political life.