sumatra, it's about choices, not salaries.
My wife and I have an above average income, I got a reasonably senior job in industry, she is a matron in an NHS hospital. Kids are off our hands, we have a v.average house, I drive a Mondeo, staff junior to me in the organisation drive BMW's and Mercs. I could drive a company BMW, Merc. or Jaguar, but I don't want to pay the tax, I take a car allowance and fund my own car.
But my wife and I choose to fly business class when we got on holiday, I'm tall, I find economy class travel unbearable.
So, looking at average salaries is the wrong angle, look at how folks choose to spend their cash.