That is a sweeping statement, what does someone have to do to achieve "middle class" status.
Lets start with the usual stereotypical 'views', these are of course my own opinions.
Drive a nice car (executive level)
Live in a half decent area.
Have an above average SALARY, at least 2x the national average (4x National average if living within M25)
Nice holiday abroad at least once a year (not package holiday) as well as a skiing holiday in Feb / March.
Read an 'up market' newspaper.
Have a weakness for WG's.
Feel free to comment if I have missed something.