Chelsea boss Jose Mourinho finds the recent spate of managerial sackings as "sad".
Five Premier League managers have been sacked already this season, including two of Mourinho's former assistants: Andre Villas-Boas and Steve Clarke.
Mourinho said: "It's sad because I think a league gets better if we keep the good things and we improve the bad things. One of the good things is that sense of stability, to let people work without pressure.
"I had Real Madrid and I left because I wanted to, not because they wanted me to. I had other clubs in other countries where it would be easier to go to.
"If I was here for financial reasons, I wouldn't be here, getting a lot less money than I had at Real Madrid. I didn't come because the job was easy, or because I had a team ready to attack the title, or for the best contract. It's the worst (contract) of my last six years. I'm here because I love the club and I love the project.
"How long will I stay? I would say 12 years. I'm 51 next month. I'd say 12 years, and two to go to a World Cup with a national team."