Oxfam released a similar stat last year, and the BBC's More or Less team didn't think much of it. The wealth numbers they're using aren't necessarily well-behaved when they're totted up the way Oxfam has done, as there are a lot of cases where wealth as-measured isn't an intuitive measure of "richness". For example, a new graduate with tens of thousands in loan debt will still have a chance at better long-term income than someone with neither the qualification nor the loan who has higher numeric worth.
That said, it's harder to find examples where the a high wealth implies a low buying power, so this doesn't necessarily contradict the crux of the piece. Either way, it's worth being skeptical of misapplied statistics.
Oxfam released a similar stat last year, and the BBC's More or Less team didn't think much of it. The wealth numbers they're using aren't necessarily well-behaved when they're totted up the way Oxfam has done, as there are a lot of cases where wealth as-measured isn't an intuitive measure of "richness". For example, a new graduate with tens of thousands in loan debt will still have a chance at better long-term income than someone with neither the qualification nor the loan who has higher numeric worth.
That said, it's harder to find examples where the a high wealth implies a low buying power, so this doesn't necessarily contradict the crux of the piece. Either way, it's worth being skeptical of misapplied statistics.