Alan Simpson: 'There is a tipping point coming'

Whatever the future of the Occupy movement, there is no denying it has already had an impact on public debate.

Economic inequality and reform of the financial system are now discussed by policy makers in a way they were not before these protests began.

But so far very little has happened.

Former US Senator Alan Simpson co-chaired a national commission on fiscal responsibility and recently sat down with the BBC's Paul Adams in Wyoming to tell him why.