She thinks it proves her superiority over them. Look how often she namedrops and refers to being "an award-winning journalist" too. She has absolutely no confidence in herself, hence all the money she spends on crap by 'designers' and at supposedly high end shops.Her total lack of manners, the inability to make the slightest small talk with folk serving her in a shop or wherever is not the selling point she thinks it is. Even if you've got a legitimate grievance with British gas, or whoever she says she's paying thousands to each month, it isn't the fault of the individual she's speaking to, no wonder she is a failure at life and can't sustain any relationship.