If you're going to blame Republicans, you should probably make sure there are enough to make a difference..
0 - https://en.wikipedia.org/wiki/New_York_City_Council
1 - https://en.wikipedia.org/wiki/New_York_State_Assembly
2 - https://en.wikipedia.org/wiki/List_of_Governors_of_New_York
First, the question the GP addresses is about the U.S. in general, not NY subways:
> I don’t understand why American governments are so bad at providing public services.
Second, the GP discussed problems in the voting public and in both parties, while putting a preponderance of the responsibility on one party - a conclusion that seems hard to escape. The Democrats aren't radically cutting revenue and spending everywhere they are in office.
Finally, the NYC subway is operated by the state, not he city, and I believe it is funded in large part by state. Much infrastructure funding also comes from the federal government.
I think also looking at it simply as a party problem hurts things, because there can be a lot of difference within the party, but people tend to overlook these things (and again, not just in terms of the amount of money that's spent, but also in terms of how it's spent).
The GP comment didn't describe it simply as a party problem; it put some accountability on both parties, and blamed the voters and everyone else participating in public discourse.
But sure, one party has made it a policy to cut spending, including on infrastructure. While the parent might be right that there are a lot of differences within the GOP, those differences aren't meaningful because they result in no differences in votes, laws, or public debate. They vote in lockstep and almost always speak in lockstep.
You can see it right now in the current tax bill. There is plenty of discussion about what will happen to whose tax rates, but almost none about what services, including infrastructure, will be cut if revenue is reduced. For one party, revenue reduction is, ipso facto, a good thing.
And to even more strongly contrast the current mindset with reality, there is almost no discussion about what government can do to help its citizens except for security.