Over the intervening years, the G10 has come to be central to issues governing the world financial system, both in the context of the IMF and the BIS. The enormously influential Basel Rules for Prudential Supervision were developed by (and, initially, for) the restricted club of the G10.
The point to emphasise here is that groups which form for one purpose can metamorphose into new functions – in this case, far more important than the initial function.