A friend of mine in the UK who travels a lot, does consulting and conflict resolution work told me some years ago, he was treated better on the airlines if he dressed well. Israel is a hot country; here it is November, and summer lingers on :-( My standard street clothes are jeans and a shirt. A few minutes ago, I returned home from a conference at a swanky hotel, and wore new, dark jeans, rather than the faded ones I usually wear, with the bottom cuff edges a bit raggedy.
Someone once said, "Clothes make the man." I would translate that to... our clothes have something to do with how we feel about ourselves.
Finally, Ruben highlighted several important points, NOT directly connected with clothes. In being but one metre away, the photographer, had, in effect, violated the subjects' space. Further, his abrupt disengagement from his subjects, sounded kind of "hit and run." It takes but a few moments and positive vibrations... to show a genuine interest in people. For me, that is far more important than fancy clothes.