It's funny to hear talk of putting on "real pants" to work (and not manual labour), where the real pants are jeans. Until the last thirty or forty years people would have been saying the same thing about putting on a suit. For that matter, there are still plenty of blogs around now where men will tell you that jeans are inappropriate for anything other than leisure, or even that men over thirty (or forty, or whatever arbitrary number they pick) should only wear chinos and "slacks" (does that term sound just as comical to other Brits?). I find them really entertaining actually.
I find it interesting the way that trends have shifted over the last twenty years so that jeans have shifted a place up the formality scale, and leisure wear (in the UK, read "tracksuits") has come in to fill the place they vacated. The people who sneered at young people or perceived commoners for wearing jeans forty years ago are now sneering at young people or perceived commoners for wearing trackies.
(None of this is a comment on anyone here, just some thoughts inspired by the discussion.)