The answer within those groups dedicated to the shuttle was to show that as long as you have enough launches, the development cost of the system would be overwhelmed by the cost of the rockets you would otherwise throw away. One factor that needs to be considered is inflation though, and in the 1970s this was high enough that the payback from the development had to happen very quickly or that money would never pay for itself. In other words you needed a very high launch rate to make the system work.
Hubble Space Telescope
Hubble Space Telescope The Hubble Space Telescope (HST, or Hubble) is a telescope located at the outer edges of Earth's atmosphere, about 600 kilometerss above the ground, orbiting the Earth every 100 minutes. It was placed into orbit, in April 1990, as a joint project of NASA and the ESA. The telescope can achieve optical resolutions greater than 0.1 arcseconds. The HST is named after Edwin Hubble. It is scheduled for replacement, by the James Webb Space Telescope (JWST), in 2009. Every day, the Hubble Space Telescope archives 3 to 5 gigabytes of data and delivers between 10 and 15 gigabytes to astronomers. Working outside the atmosphere has advantages because the atmosphere obscures images and filters out electromagnetic radiation at certain wavelengths, mainly in the infrared. Hubble