The problem is like the Shuttle, ISS was pennywise and pound foolish. Congress wasted much of a decade sending NASA back to the drawing board again and again to reduce the cost of Space Station Freedom, ultimately spending more in these redesign efforts than was saved by down scoping the station, and resulting in a station hampered in its ability to do research. Cancelling the Hab module for example means several racks on Destiny are used to provide ISS life support rather than R&D. The Centrifuge module was cancelled, along with the R&D opportunities it could have provided. Most importantly much of the funding originally planned to create an organization to facilitate research on the station and establish network of universities with supporting grants was cut. The original plan was to have something similar to the Space Telescope Science Institute (created for Hubble), in place for ISS operation. Rather we have CASIS which was only founded in 2011, and has been a complete and total disaster.