When considering the topic, remember that characters are exceptional individuals, not run of the mill.
Further, Social Status does not give noble rank, rather the other way around. The best salesmen may have a high SS, getting them into the best parties and boardrooms to make deals, but have no standing outside of the sales pitch related hobnobbing. And, SS may not transfer from one situation to another. High rank in a religious organization may go far at home, but in a place that has little liking for religion, all most worthless.
Social Standing, without Rank
Consider Paris Hilton, a real “noble” in the US, born into a wealthy family, with a famous name. A classic Dilettante, she ran around talentlessly doing stupid stuff on TV (and in certain videos), because she could afford to buy herself the attention. Meanwhile, one of her hanger-ons, of no real social standing (daughter of the lowest of the low, a lawyer), catches the eye of the public. (That is, she had her own sex tape.) Now, she and her siblings are extremely popular and have a high SS, yet they would be considered anything but noble. In a few years, she will slip back into obscurity, as her looks fade, and others come along to take her place in the spotlight, and her SS will return to it's lesser level.
Power, without Social Standing
Another point is that many administrators in any government or corporation never reach a high SS, yet gain high place in the organization. They do their job, and do it well, or well enough, but are not the ones that go out in front of the press, or host the big party. They are the ones that make sure the event goes off without a hitch, and woe be the one to screw things up, as they have the power to put you in your place. These people often have the word “Executive” in their title, but are not executives, themselves. They are fine with that, as they are not leadership material. A good example of this can be found in the book “Lucifer's Hammer”, by Larry Niven and Jerry Pournelle (from who's “Mote in God's Eye” universe the Traveller 3rd Imperium seems to get it's structure.) The Senator's assistant, his number one, is not going to be the one to replace him as leader. Much of the book deals with the question of who will end up in the “Throne”, which will have that same assistant standing behind it.
Now, the real trick is not to get caught up in what the rules say, or don't say. Or, in what seems logical, or not. Don't worry about whether something is “broken” or not. Your job, whether you are player or GM, is to find a story that makes it work. That's right, make it up! This is the results that the dice and tables gave you, now you get to connect the dots. Don't expect the rules to fill in , or explain, everything, that's your part.
Then, again, you often don't have to, either. Obsessing about a characters past may not be productive, from a game point. If you are running and gunning most of the time, is it important that the PC didn't get that SS boost in creation? Spending effort on that part of the process may not be what you really need to do. Just as a game master may over prep for a session that never uses anything he made, spending hours justifying the dice rolls may never pan out, as the topics never come up in play.