Location - Aisle 4, Sainsbury's, Trowbridge, Wiltshire.
Time - 1230 today.
I did the weekly shop this morning, as usual. As I was placing the food etc onto the conveyor belt, I could overhear the cashier and the customer ahead of me bitching about the latest M&S advert, saying how 'smug' 
it was and how it reminded people of how little money they had.
Fast forward to my turn in the spotlight...
The cashier struck up conversation with me and mentioned the conversation she'd been having, about "rampant consumerism" and how "disgusting it was".
Not entirely clear what exactly she meant and suspecting strongly that I disagreed with her if what she meant was what I thought she meant (i.e. "w*nkers" like me, with money, spending it), I just shrugged and said, "I wouldn't knock it too much...if people weren't buying stuff, you'd all be out of a job, surely?".
She gave me a cat's bum smile and said nothing after that, other than to announce the total cost of my purchases (£155.50) in a very disapproving tone 
.
We have friends for lunch tomorrow (2 adults, 2 children) and yes, I pull out all the stops when entertaining...but (annoyed at myself for feeling I have to chuffing justify my purchases!) I've also bought a week's worth of food for me, fiancee and our baby girl.
AIBU in thinking I should be able to buy any amount's worth of food without disapproval from the supermarket staff?