In his new autobiography, 'Carra: My Autobiography', the former England defender wrote: "For richer or poorer, we'd sold Liverpool to two ruthless businessmen who saw us as a moneymaking opportunity.
"They didn't buy Liverpool as an act of charity; they weren't intent on throwing away all the millions they'd earned over 50 years ... They wanted to buy us because the planned stadium offered a chance to generate tons of cash and increase the value of the club."
Carragher said the internal strife swelled in the aftermath of the May 2007 Champions League final defeat to AC Milan when Benitez demanded that Tom Hicks and George Gillett quickly invest more money in the squad.
"These words sparked a chain reaction that brought problems into the open, almost cost (Benitez) his job a couple of months later, riled Liverpool's owners into an ill-fated meeting with Juergen Klinsmann, and ended Hicks' and Gillett's honeymoon relationship with The Kop (fan base)," Carragher wrote.
Hicks acknowledged talking to former Klinsmann about replacing Benitez last November during their public spat over player transfers. Klinsmann, the former Germany coach, is now with Bayern Munich.
Carragher said he was surprised that Benitez defied standard workplace practice by going public to "slag off your boss."
"I understood why the owners were unhappy with him too," he wrote. "They'd been undermined by Rafa and now they were undermining him.
"It was a political rather than football battle, and although the fans wanted to see it in black and white terms, with the owners the bad guys and Rafa their hero, I saw far more shades of grey."