philanthropists or plutocrats? To be or not to be?

Tonight's PBS Charlie Rose program had the interview with Warren Buffett, his son and grandson, all are dedicated philanthropists. His son loves farming and has to pay his dad the rent for the 400 acres (=1.6 km^2) farmland his dad bought him. The three generations of Buffett family almost spent their full time to distribute 99% of Buffett's $46B fortune for philanthropic purposes. Bill Gates and Warren Buffett, No. 1 and 2 of US richest, want people to remember them as philanthropists rather than just plutocrats. Western and Eastern cultures have some significant differences!