I think the greater issue lost to most is the privatization of roads (or infrastructure) in America. These lanes are often built with agreements that NO other road improvements can be made for quite a number of years (75+). Of course these roads are going to turn a profit with the suburban growth and high demand for road capacity. The real question is, do we want to turn these profits over to a private company, or do we want to turn the tolls over to a toll authority within the state that can then manage further expansion of roads or other transportation options? The state is about to enter into a massive agreement to give away a large portion of right of way for profit - that's an issue.
Look to Ohio, Illinois, and Virginia for how some of these contracts work out in real time. While they provide additional capacity, citizens should read between the lines. "Managed lanes that keep things congestion free" means high toll prices, and profit.
As long as people work in one centralized location and there is a high demand to get to that location at any single time, there will be congestion. You cannot build your way out of congestion with freeways, transit, sidewalks, bike lanes, or any other mode of transportation - congestion is part of living in a city plain and simple.