Earlier quoted context omitted.
Lots of places in the world run public bus systems - it seems by far the most common to me. It's hardly a thing of 'socialism' (always a bad word on HN).
I don't know about Chile, but I think the issue isn't so much the system being public , as in run by some form of government. Rather, the issue is in how "socialists" tend to run systems: everything is great until they run out of other people's money. Now, I'm not in the "free market will solve all our woes" camp, either, especially when it comes to what we call "public service" in France. Over here, transit systems…
That would seem true of any organization other than a self-funded one. All corporations, banks, governments, etc. use investment by others (including taxpayers) and cease operations if that investment stops.
The bland generalization about 'socialists' isn't meaningful without some evidence and a specific falsifiable claim. We can make statements like that about anything.