Appearing on ITV1's Daybreak, he said: "Why is it that one fire service can cost twice as much as another, even though if, per head of population ... it is in a very similar area?
"If those above the average cost just as much as the average, which provide really good fire services, there is £200 million to be saved.
"So it is right that these questions are asked, and that it is answered and debated by the fire and rescue service leaders themselves."
Dave Green of the Fire Brigades Union warned that lives could be lost and reducing the numbers of firefighters would be "completely wrong".
He said the reduction in callouts was due to the preventative work of the fire service, but any cuts could mean preventative work was diminished.
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A shock election result in 2010 created a marginal constituency with a four-way battle five years later.
Luton was the only place in the Anglia region that retained Labour MPs at the last election as the party lost more than a dozen seats.
Tonight starts off dry with clear skies but it will cloud over from the west with rain arriving later.