And a lot of taxpayers who are not voters (non-citizens).

while true, the bigger problem is the "two-party system." Democrats get voted in and do nothing or make things worse, but when election time comes around again, people'll keep voting Democrat again and again, because they're most certainly not going to vote Republican, and we've somehow been brainwashed into thinking that those are the only two options for any elected position. with no viable competition, corruption spreads and entrenches itself, and the whole region generally decays over time.

that it's the Democratic Party we're talking about here is irrelevant—this is just a natural consequence of the two-party system.

That may be generally true, but not in SF. We have open primaries. Most elections are two Democrats against each other. Sometimes it's even a Democrat vs. a Green.

I'm a bay area registered Democrat and strongly agree - no electable opposition party = political atrophy and the corruption we are seeing more and more of

There is a specific District Attorney in SF who is extremely anti-law enforcement and campaigned on it explicitly, and fulfilled his promise.

https://en.m.wikipedia.org/wiki/Chesa_Boudin