when global economies slow down, the middle class generally disappears... The number of the very rich increases slightly, while the number of the poor rises so much...
And yes when this gap widens, luxury consumption also raises. you can see more luxury things like cars etc in this case...
I remember seeing a documentary about luxury goods such as Gucci bags and similar accessories (most shown were woman ones, if that's relevant). It claimed that a large number, if not the majority of their customers weren't wealthy people, but the middle class, because they wanted to appear rich (social status whatsoever), the truly rich people didn't bother with such petty items. It's been a while since I last saw the reportage, so I don't quite remember the details, but a quick Google search brought similar results to those I mentioned.
Link's
here.