From the time of old, there have been the poor and the rich. Why then are the poor getting poorer, i guess it have to deal with the words called connections and risk
The rich already is wealthy and will definitely take consideration when taking risk that involves money, an well, s/he have the connections to make things happen while the poor have none of these. But with careful calculation and calculated risk taker will always join the billionaire if s/he put the brain to work. That's one reason we have proof of brain.