[octo888]

Exactly. They're middle class sounding enough (sufficiently middle class). That's what's funny

And nobody said there anything wrong with being middle class.

[agedclock]

It is implied that there is something wrong by the fact that it is mentioned in such a manner.

[pseudalopex]

It implied there was something wrong with trusting every chiropodist and professional photographer more than any cook or army sergeant. It implied nothing about being middle middle class.