The reason I ask is because I'm working on an idea. Leave the heavy lift systems (like Energia, and Aries V) to Nasa or another government space agency, and let the private sector focus on transporting personnel and "Fed-Ex" type packages to and from Earth orbit.

IMO, once a robust launch system is put into place; then everything else becomes possible. The Aries I should be abandoned, and everything for a Moon mission launched on two Aries V launchers. This would allow for complete commonality of the launch fleet and cut the per unit cost of each launcher to $180 million or less. It would also allow the CEV to offer better radiation protection as the Aries V can lift more weight than the Aries I.

The Aries V should designed to launch payloads both piggybacked as well as stacked on top. Doing so would allow a new large shuttle vehicle to be designed and launched from the same launcher as the deep space CEV. The CEV could be used for Lunar and NEO missions, while the large shuttle could be used for Earth orbit construction projects.

The small SSTO vehicle would be used for personnel transfers and delivering needed equipment and/or supplies. It could be operated by private firms contracting their serves out to Nasa.