Another issue that occurred to me is, how can you respect someone wearing a pair of pyjamas?
There was an item on tv a few weeks ago talking about the increasing number of NHS staff being attacked. The person being inteviewed was an A&E consultant, though you would be hard-pressed to gather that from the shapeless scrubs he was wearing.
If you look scruffy and casual in any other area then you don't get treated with the same respect that you get when you are wearing smart clothing. Try walking into Harrods in scruffy jeans and a ripped t-shirt and see the reaction you get!
Perhaps, instead of looking for the cheapest option the NHS should be looking for the smartest option and see if the staff end up being treated better because they actually look like the professionals they are meant to be, rather than someone who has just got out of bed.