Language and representation - privilege (wealth/class)

This is from The Poke which is a chiefly humorous site with an undercurrent of political satire. These are 'hearsay' and proabbly crafted for effect but 'Highgate Waitrose mums' are being represented in a particular way here, both in the language itself and in selecting and editing this body of 'evidence' together. Please comment on where you can see privilege encoded in the language choices (how are these speakers represented) - just pick one or two aspects to leave plenty for others to comment on. As always, the GRAPE is vital to consider.