Stiliyan Petrov insists Celtic's dominance is a danger to Scottish football.
The former Hoops star believes that his old club competes only with themselves, and not with the other clubs in the Premiership.
It comes as Celtic look certainties to record another treble come the end of this season.
Ange Postecoglou's side defeated Rangers 1-0 at Hampden on Sunday, with Jota netting the only goal.
It means heading into the post-split fixtures that Celtic are unbeaten in all five of the derby fixtures against the Light Blues so far this campaign.
Petrov pointed out that much of Celtic's success is purely down to Postecoglou and how he operates to stem that progression.
But the Bulgarian cannot see any team being able to compete with Celtic for some time.
"They're quite far ahead," Petrov told Sky Sports. "Recruitment, financially and playing style - if you look at these three pyramids, you can see that Celtic are way out ahead.
"What they have to do now is to add and recruit well again.
"Ange Postecoglou has shown that he wants to develop the team, the club, and their mentality. He wants to move forward every single time. Not every year, but every game, every opportunity, and with every result.
"That's what he's brought to the club. That belief is that the club is going in the right direction and that they don't look back. They don't compete with anybody else, they compete with themselves which is dangerous for Scottish football."
Petrov was speaking after his foundation made donations to Beatson Cancer Charity and Glasgow Children Hospital Charity.
Our Celtic Digest newsletter brings exclusive content directly to you rather than solely through the website. You can already find us on YouTube, Twitter, Facebook, TikTok and Instagram but we will also send bespoke opinion pieces and special features directly to your email inbox every evening. Not only will you receive this article from Sean Martin, Tony Haggerty or Aidan Macdonald (or, sometimes, from all three) but you will also get easy access to our best content from the last 24 hours too. It’s a great way to keep up to date with what’s happening at Ange Postecoglou’s Scottish champions. To sign up, simply take five seconds to type in your email here. Simple!
