I took a look to see if Softbank was hiring any vetting-watchdogs to prevent this in the future.

They had one open position. It required all applications to have an extensive history at a prestigous VC firm, i.e. they are looking for people from the in-group.

I think a less-incestuous vetting strategy would give more honest results. Too bad, I think there's a lot of people on HN who would excel at this position despite not having worked at a big VC.