Yeah it works for me too Paul.
It's got one of those listenable lyrics that don't seem to need a chorus and that solo section hits at just the right time with that little set-up verse beforehand.
The repeated friends on benefits bits after that kind of act as a big chorus at the end anyway.
Yeah the structure is not normal (ha!) but it works well.
I had to dig up the lyrics from the lyric section (not that I needed them, must be a habit now!)
Welfare state of mind might make a good title sometime but perhaps a bit obvious and 'friends on benefits' is a GREAT title anyway...little bit of a rhyme in there and rolls off the tongue so nicely!