If you and your descendants can live in comfort without work and you can hire other people to serve you, then you are rich.
Rich as a class are those who are independently wealthy, having enough wealth to perpetuate their status without giving back to the society. If they do work and contribute they do it because they like it and not because they have to.
Like Royalty? Or do you mean like Kim Jong-Il and Castro?
All the "Rich" folks I know of actually work.
Most of us work hard to reach that point before retirement when we can no longer do productive work. Unfortunately, some of us will never reach that goal because we are taxed heavily to support people who refuse to lift a finger toward the same objective.
"Giving back to society" isn't a voluntary choice in this country. 50% of every dollar I earn is confiscated by politicians who have decided to "give back to society". Doing good deeds with my earnings and claiming credit for having done so.
Suppose I want to build myself a house but I don't own the tool to do so. Suppose you have the tools and rent them to me. Did you contibute to the building of the house?