Not the United States as a whole, but certainly, California is at pretty close to the same level of corruption as China.
And in other ways, China is very different from California, or from the United States as a whole.
A crucial thing to make any mass transit system feasible, is that there need to be stops or stations near every place that anyone needs to go. That's much easier to accomplish in a very dense nation, such as China, than in a much more spread-out and diverse place, such as California or the United States as a whole.
Again, it takes not just an ordinary level of ignorance, but an extreme
pknopp level of ignorance, to assume that what works in China will work in the United States.