I suppose it's some sort of market failure that municipalities are allowed to basically kick the can down the road, building ever more infrastructure without the revenue to sustain it, but that's generally not at all what people mean when they talk about market failures, is it?
As I said, I love this series, and he sounds right about everything, but calling it a journey from free market ideology seems odd, since most of the issues he has are with governments making bad investment decisions (unless I'm completely misreading this). If they were companies they would have gone out of business and lost their ability to make such bad decisions (hopefully, if not, that would also be a market failure). It just seems odd to describe actions by governments as actions by market participants when the line is usually drawn between government actors and market participants.