Why? Because she promises to resign at the next general election.
There is no public confidence in this Parliament, and rightly so. Many are retiring next year, many have been forced to go, and many more will be chucked out, having been found out as worthless, dishonest also-rans in a discredited ruling party. These are not the people to elect a new Speaker who may be in the chair for fifteen or twenty years.
So it's time to hold one's nose and vote Widders.
UPDATE 10.39: "Tories threaten to expel new Speaker after election" Political Editor of Evening Standard. They are worried that it's Beckett or Bercow. Well, you know to avoid such a situation.....
UPDATE 2 18.55 Well, it won't be Widders; My guess is that Young beats Bercow by a narrow margin, and we are spared the awful little greaser camping it up in uniform. Will Sir George Young, who strikes me as a Whig, if elected, restore the wig to the Speaker's head?