I'm sorry, I'm having a hard time following your math. Could you please enlighten me?
8.3bn people on earth. 90% if that is ... more than 3.5bn? Something like 7.4bn? How can "the bottom 90%" be included in those 3.5bn?
And I also don't follow where the "a million people in the bottom 90%" are suddenly coming from. Which million out if those 7.4bn people?
I'm really at a loss w.r.t. your arguments.