A) This is implied to mean people of working age, so under 20 doesn't count.
B) The 0.01% is not all billionaires, but they are all extremely high-net-worth individuals. These are people that are not only set for life, but with proper money management and tax planning, could carry on for generations without having to do a lick of work.
B) The 0.01% is not all billionaires, but they are all extremely high-net-worth individuals. These are people that are not only set for life, but with proper money management and tax planning, could carry on for generations without having to do a lick of work.