Well, in that case, why scrap the place in 2017? B-52's are still flying after 50 years. Shouldn't we then try to get at least 50 years out of the ISS?

But then again, the main problem with the ISS is its orbital inclination, which makes it very expensive to interface with other manned projects in space. So if we're going to have space stations at all, maybe it would be best to build a new one in a low inclination orbit. If that means oxygen will be sucked from the ISS program, then so be it.