How did you get $2 million from that? What distribution did you assume? According to [0], net worth of $1 million would put you in the top 0.7%.
[0] http://www.international-adviser.com/ia/media/Media/Credit-S...
[0] http://www.international-adviser.com/ia/media/Media/Credit-S...
Thus one needs a proof short enough to get through that barrier of near instant disbelief.
A very rough sanity check shows: $263,242bil / 2 / ( 7*10^9 / 100 ) = $1,880,300 ie approx 2million
Obviously this is a highly simplified approximation, of necessity for that audience.
Equally obvious, it is vastly greater than $34k.
According to your claim there would be 70 million millionaires in the world. Sanity check there?