I think Canary got it. I suspect out of exasperation at the Council's cuts, he made a comment along the lines of "Well they cost the council too much money and so the answer for the COuncil is that they should be put down". I think this was directed at the COuncil removing funds from where they are most needed (as many councils are doing at present). I recall at a recent Councillors' meeting where the cutting of care was being discussed one member said "well let's just euthanize them". He didn't mean that all elderly folk should be taken out and shot, he meant that it was more convenient for the Council given the way they were being treated.
However, if he just meant it as a straight forward "I am a Finance Specialist and i think anyone less than perfect should be exterminated", he ought to be taken out and shot.
Yours, less outraged than everyone else.
(PS as the step parent of a disabled lad, who fights tirelessly for his provision, if I thought for one minute Cllr Brewer meant this in the way it has been interpreted, I'd probably be knocking on his door asking for an explanation, in less than polite terms).