oh probably, yes. but their heirs and the next 1000 rich assholes would just take their place eventually.
if a few million people in say, the us, decided to try and stop the flow of money upwards... it would essentialy implode the greedy capitalist system that produces these people in the first place.
a few million represents one digit percentage of the population and theres probably more than that willing to act on it. just pick your favorite kind of anarchist or socialist methodology.