Bleve has said, and I quote:
"Now to climb against gravity we have to add energy and this ideally comes from the engines increasing thrust. Where the problem arises is if we are cruising near max altitude and the aircraft is cruise thrust limited. If the engines are at max thrust, they can't add any more energy. With the autopilot maintaining a constant Flight Level, but the true altitude increasing, the only available source of energy is speed. ie speed is converted into height and the aircraft's speed reduces."
Of course, all airline pilots, even brand new First Officers on jet a/c, know that this statement has a major flaw based on lack of knowledge.
Hopefully Bleve will do some research, or at least speak to some of his pilot friends, and withdraw his statement!