The only reason people have finished inferno is because people exploited their way past Act 2-4 inferno. Blizzard closed those exploits, but the people in A4 inferno then did non-combative farming (chests+goblins) which produced the gear you see on the AH and allows nonexploiting people to progress to A4 inferno.

If that's not totally broken, I don't know what is.