I think the top end designer bags have been selling so well for the past 5 yrs mostly because people are afraid of the next price increase...and the next...and the next...and the only ones who are really winning are the ones making and selling the bags. With quality being the same (or even worse, in some cases) and many of the designs being classics that aren't really being remade or -designed, the basis for the increases can't be much more than "We can do this so let's go for it".
Mulberry was a prime example of this. And look at the state of them now.
One way to stop or slow down the increases is to stop buying. There's a point where the industry has to admit their excuses for not lowering the prices ("To not upset those who have bought their bags at a more expensive price" or "We are harmonising the prices globally") are just that - excuses. "We are greedy" is closer to the truth.
Making smaller versions of bags is actually not catering to the masses of people with lesser means than some - it's catering to people with more money to spend on a small bag. If someone is in need of a larger bag, they will go and find it somewhere else. If someone is ready to buy a bag they don't need instead of something useful - like the on-trend minis - just for the sake of owning a
Prada/
Gucci/
Fendi/whatever brand, then it's their own business. I just think that's not really smart. A bit sad, actually; it's just a bag. An item. It's not going to make one into a better person.