Do you think part of the problem is that nowadays clothes shopping is seen as a hobby rather than a necessity of life? I'm not saying clothes shopping wasn't an enjoyable experience in years gone by, but perhaps it was done less frequently, out of necessity to replace worn out clothes or for a particular occasion?
Now, visiting the high street at the weekend is the norm, browsing with no purpose is fine, wearing an outfit just for one night out is acceptable (I can't believe people do this!). There are only seven days in a week, we don't need bulging wardrobes of multiple items we can't possible use till they wear out. Just look at wardrobes in charity shops, they are tiny. Now we feel the need for wall length integrated cupboards and drawers, even whole dressing rooms are considered fine if you have a room going spare.
Whoever started this thought process, the consumer or the suppler, this is where we are. Providing clothes at this epic proportion you're going to see the quality drop. So perhaps it's our mindset towards wearing clothes which needs to change before quality improves? (and boards like S&B become defunct, oops!)