I admit, I am a little confused about the Madrid store issues due to translation problems. . . It seems someone from within Hermes is offering to sell bags outside Hermes? That would be not okay (the old "It fell off a truck" Birkin

), but if it's a case of straight reselling--I bought this from Hermes and am flipping it--well, that would be legal. Or is an Hermes employee steering clients to a reseller?

I do understand why resellers annoy people--when an item appears a day after its launch marked up 200% it IS frustrating--but resellers exist because people buy from them, and people buy from them because this is a service people want. Clearly, these markups are something the market will bear.
And yes, I think it's pretty widely known that at least at some boutiques, sometimes, there is a tacit or explicit expectation that a customer must buy from a variety of product lines in order to be offered a bag. This may be a perversion of the Hermes ideal that its customers "embrace the brand." What Hermes would like, I think, is someone who can afford to--and who wishes to--use Hermes products from more than one of their lines, so housewares, RTW, jewelry, etc. as well as leather goods. But perhaps SAs, knowing that this process is a gradual one and also knowing that the client standing before them is a tourist who really just wants a Birkin, are condensing that concept down to, "Buy $ amount from other departments and you get your bag." Again, I don't know, but if you as a client don't have the opportunity, the patience, or the inclination to buy anything but one specific bag, I can see how this "buy in" approach might arise.
As others have said, it is always the client's right to walk away.