Sir Alex Ferguson has again launched a staunch defence of the Glazer family.
The Glazers are the subject of a long-running campaign from the fans over the way they have managed the club, running up huge debts, signified by the wearing of green and gold at Old Trafford.
United may be the top football club according to the Forbes Rich List with an estimated value of US$1.84 billion (£1.18billion), the debt is over £700 million.
Sir Alex has long defended the Glazers, and told CNN: "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. 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.''
Ferguson, 68, also spelt out his intention to carry on at the helm as long as he remains healthy: "A lot of factors come into most important things. I'm at the right club, it's a fantastic club, it demands a challenge all the time. Every day, every year there's the challenge of being at the top and that helps me. I think you need good natural energy and I've been blessed with that.
"I'm very fortunate about that so I'll keep going as long as my health keeps going. The same applies to every person. I'm 68 and so far my health's been standing up. If I have my health I can carry on. There will be a point when I do quit but I have absolutely no idea when that is. I tried that a few years ago and it was an absolute disaster. Agony. My wife made me change my mind and she was dead right. I think she was soon fed up with me in the house. Now when the time comes I think the club should be okay.''