We all want to succeed. We all also want our friends and business partners to succeed. It's just that people who have lots of money and power are better at accomplishing that than the rest of us. We all help our friends out; only the scale is different.
That explains a lot actually. Powerful and simple explanation for the world we live in. However, pretty much the opposite of the so-called "trickle-down" mechanism... more like "trickle-up".