I don't get why knit pants should signal the decline of civilization. Actually, I'm glad there have been so many improvements to the fabrics we can enjoy now. Just because a fabric is a knit, such as ponte, double knits, interlocks, etc. does not necessarily mean the styling will will be less refined.
Knits have a certain amount of built in stretch due to how the threads composing the fabric are joined. Woven fabrics, like good old fashioned denim don't have much stretch. Natural fibers, like wools and cottons, tend to bag out over time. Without the introduction of elastane, etc., none of us would be enjoying the stretchy skinny jeans so many favor now. We can get them off and on...and the stretchy material, elastane or whatever, helps the fabric recover its original shape...therefore, keeping the garment looking nice.
I'd rather see people walking around in these knit jeans, which at least strive towards a decent fit and tidiness as opposed to yoga pants or sweat pants.
I'd be more inclined to pick on the shoddy craftsmanship found in so many garments sold by mid-level and even higher end shops. Wool pants without lining? Doomed to bagging out and not draping as nicely over the figure. I could go on and on in this vein
