American here (although I own a swiss business and travel there frequently).
The reason that americans do not embrace these things is that, for the most part, the United States still has a very, very flat social hierarchy.
If you put Joe-6-Pack and Larry Ellison into a room together, J6P will still hold his head high and demand equal treatment and respect - from both Ellison and other third parties.
But J6P intuitively knows something else: asking for favors alters that relationship and establishes an explicit power balance (as opposed to the implicit one which was obviously there to some degree).
On the other hand, if you come from Europe, the idea of a "better class" isn't so foreign - even if you disagree with it. That power balance is quite a bit more explicit and there is a fairly well established (sometimes in blood) "contract" between the people who work for a living and the people who own things.
Personally, I like the American arrangement but I think it's days are numbered - eventually the sorting will complete itself and workers will have more days off ... but "gentlemen" will have certain privileges like english lords do in 2016.[1]
[1] Exemption from jury service, immunity from arrest for civil cases, "access to the sovereign".