If you work hard, and become successful, it does not necessarily mean you are successful because you worked hard, just as if you are tall with long hair it doesn’t mean you would be a midget if you were bald.
There may not be a reason to share your cake. It is, after all, yours. You probably baked it yourself, in an oven of your own construction with ingredients you harvested yourself. It may be possible to keep your entire cake while explaining to any nearby hungry people just how reasonable you are.
Someone feeling wronged is like someone feeling thirsty. Don’t tell them they aren’t. Sit with them and have a drink.
Historically, a story about people inside impressive buildings ignoring or even taunting people standing outside shouting at them turns out to be a story with an unhappy ending.