I suppose it's because this idea of individualistic and competitive 'work hard and make it yourself' attitude permeates our culture and so nepotism, or this case taking advantage of powerful family ties, is somewhat frowned upon as a free ride to success. Of course this also contrasts with our favor for another potentially major part of success based on who you know rather than what you know and social networking, both of which are less frowned upon than nepotism.
I guess the US and like countries attempt to base privilege on well-documented rules instead of ad-hoc, less predictable and more ambiguous 'do me a favor and I do you a favor' bribery that's more known in other countries. Of course it doesn't always work this way but in theory. The good ol' boy network is still a thing and money does buy judicial privilege in many cases but at least we sort of try.
I guess the US and like countries attempt to base privilege on well-documented rules instead of ad-hoc, less predictable and more ambiguous 'do me a favor and I do you a favor' bribery that's more known in other countries. Of course it doesn't always work this way but in theory. The good ol' boy network is still a thing and money does buy judicial privilege in many cases but at least we sort of try.