Why can't we? Because the ARU are crying Pooor - and do not put the effort or the resources into it that it needs... Given our playing numbers, Australia will always need to be better resourced, better organised, and just smarter, than NZ or SA in order to even remain level with them... I don't think Kenya 7s team is a joke at all - I think it is a team which takes themselves and their opportuinities very seriously - perhaps more seriously than we do.
To be completely honest tho' I think the current 7s playing strip gives a clear insight into the contempt with which the ARU actually regards this team...
I believe that under O'Neil, if he could have found a convincing reason to stop spending any money at all on 7S, He would have tried it.
Additionally - you mention Higgers in 2007/8... that is an important point... MOST (not all) players only really have about 3-4 seasons in them at the top level, as it is so quick, and the fitness levels so demanding... Of course, getting through a tournament, is not the same as WINNING A tournament... There are players who have had longer 7s careers, but i would argue they played in very strong squads, and were athletes of a relatively specific type. I think Higginbotham - who is the 2nd player I would pick for the Wallabies behind Genia, would find that 4 years is an incredibly long time in 7s...