How much your flip-flops or T-shirt costs is irrelevant. Some people don't seem to get that idea.
And yes, I am sure we have all seen how people dress up to go weddings here. It's disgusting, and it DOES reflect on the person's mentality that he/she is no better than people who litter.
However, on a day to day basis, what the average person wears on the street is fine by me. Weather hot, lah. And personally, the s-man always appreciates seeing a bit of skin.
it's interesting that what is deemed normal will be highly dependent on what the social norm is, rather than what is good or bad or disgusting.
My friends got married in t-shirts and jeans, that was a way of showing their approach towards life and their wedding rings were made of rubber. I found it extremely quaint and interesting.
I don't think that it's not a matter of judging whether a style of dressing is good or bad but whether it is appropriate or inappropriate for an occasion.
And DEFINITELY should not be used as an analogy of people littering.