It doesn't yet, and by large I suspect it won't for the foreseeable future. We're doing proof of concept works on things like public records, task registration for legal oversight, landownership and such.

There is a company who've build an organizational component on blockchain tech. This may seem odd to a lot of people, but we're required by law to keep a bi-temporarily record of how our organization looked and who held responsibility for what areas and cases. So far he only option has been an old mainframe system, and it doesn't integrate too well with other components such as the pay-system. I'm not sure if blockchain will carry this responsibility, a lot of other companies are struggling to meet our demand on non-blockchain and it's an extremely hard market to enter, but the blockchain based solution came first, and is currently the only option, do who knows.

I work in municipal IT in the US and I was wondering the same thing.

probably some manager is invested in bitcoin

Only thing I can think of is a ledger. If it isn't about currency then it is some sort of ledger.

Maybe it's a clever way to pay property tax. There's no other use for a ledger that couldn't just be a database+transaction log.