FWIW, there are a number of ways for the private sector to pay for infrastructure, with two significant (but, imo, surmountable) caveats:
1. Even for infrastructure that provides a significant ROI (means you can directly calculate that it created significantly more in municipal revenues / economic growth than it cost to build), it is very difficult to monetize that cost. Not many banks sitting around for 30 or 50 year infrastructure returns... or even 15-20 years. If you could find a way to monetize these future "profits" (private sector and tax ratables) to finance the deal, it's doable. But as I noted above, the tools don't / no longer match the market need.
2. Some infrastructure is SO far out (at least 30, or 50, or 100) in terms of its benefits or, more likely, on such a large geographic scale that it becomes difficult or impossible to accurately monetize it - but without some of those systems that serve everyone and everything there are no earnings to begin with.
I'll leave you all with one example. Something that was invested in over 100 years ago. Loses money every year. Even with cost to use the service. Huge public monies to help support the system.
Yet, I'd suggest it might have the greatest ROI of any infrastructure in the County. Because without the Subway, NYC wouldn't be... well.. it wouldn't be. Going to be hard to convince me that is not worth every penny - 100 years ago, 50 years ago, today... and we need to invest for the next 50.
I understand that our infrastructure is not going to be a profit generating endeavor, but how can you justify the costs involved with doing any of this with the way things are today in this country? The cost of building the 2nd avenue subway is a great example and where is that money going? The project cost and just total nonsense layered into these contracts discourage supporting these improvements, no matter how needed.
Appreciate the response, and I think it's an important point you make. I think most agree that if it were properly managed, investment in infrastructure is a positive, on a number of levels. It appears that your issue (and many others) is not with the notion of investing but rather how poor a job the gov't usually does in managing the money, the process and the projects.
You pointed out just one example. Another is East Side Access - over budge, taking forever. So was the Big Dig in Boston.
Now, EVEN with all the waste, corruption, cronyism and interests in the above, they have / will end up being huge economic boons for those cities and the surrounding region. And that's under the current terrible system.
That said, I agree that we must reform the way dollars are spent, and as I've said before, the best way imo to do that is get the private sector involved and doing the work. Gov't should facilitate and provide a framework for the private sector to create and deliver products and services. They should not (because they generally suck at it) be doing the execution where a private business could do it better, with profit incentive.