That, actually is a good description of Capitalism in its ideal form. Hard workers get rich, lazy people become poor.
Unfortunately, without a few regulations and socialist programs that even Ayn Rand admitted are necessary, every civilization on the Earth, throughout all of human history, has fallen to unregulated Capitalism (similar to what we have in the US today), and every one of them has passed right by the ideal, moved through severe pay discrepancies, and went straight to producing “a few wealthy people at the top, and everyone else working/slaving for them.” I.e.
a plutocratic aristocracy.