The Glazer’s took control of United in 2005 and the club have since been riddled with a reported £1 billion debt.
“The debt has come through by the club being bought out by an owner. You know full well that when a business is bought it’s usually bought with debt,” said Ferguson.
“Because it’s a football club it seems to attract a more negative reporting from the media and from the fans.
“But Manchester United football club, when it went plc, it was always going to be bought. It was inevitable.
“So when a particular family like the Glazers have bought it, it’s unfair they come in for criticism because anybody could have bought it.
“I have to say they’ve done their job well. They support myself, the manager, they’ve supported the players. I’ve never been refused when I’ve asked for money for a player.
“So what can I do other than carry on the way we’re doing it and the way I’m allowed to carry on, I’ve no complaints.”