I don't know how dire it is in general, but there's at least a fighting chance to have some kind of unified login at that level. NThinking about it, now that many "casual" sites also accept google login the number of accounts needed might really be minimal.

Unfortunately (at least in the US) these types of services tend to be a patchwork of different agencies at different levels of government... you'll potentially see local, regional, state, and federal all for one person. If you're lucky agencies at the same level might share a unified login of some sort, but good luck finding that across different levels.

You really only need one very secure password (to your Gmail account) and you can store all the others there.