I think the fact that every large society on the planet ever has been based on this model is important.
> is the only option for people in poverty really to wait for a promotion
You're overstating my position. Don't wait for an opportunity; create one. But yes, pretty much. There is simply no responsible alternative. You can't run off into the wilderness and fend for yourself. You have to live inside the system we have created. It's really not that oppressive. You should try it.
> I think there are more paths to fulfilment than you realise.
I think the paths that you see as one are many.
edit:
> do we descend down that hierarchy of needs as soon as we step off the conveyor belt?
No, we don't. Ah I see, so what you're advocating is retirement? I think we agree!