I don't think it's so much that human space flight is going away as it is that human space exploration is going away. I think that we are going to be expanding into the local space a lot more. We'll start for energy collection and mining and, eventually, we'll go just because space is a cool place to live once we work out the kinks. Ideologue factions looking for autonomy will probably be the first to leave. Imagine the Amish in space.