The Master smiled, predetory and cold. "Perhaps. But nothing's simpler than the truth, and I am the Master - of my fate, of Torchwood and as soon as I can do so without screwing my own timeline, the Earth. I'll work my way out from there."
After all, what would be the point of merely being the ruler of a bunch of mewling little humans when he could use them to bring the entire galaxy - the universe - under his control?