The Tampa Bay Buccaneers are currently paying three head coaches: Greg Schiano, who signed a five-year deal in 2012, Lovie Smith, who signed a four-year deal in 2014, and Dirk Koetter, whose contract is for five years according to the Tampa Bay Times, confirmed by Ian Rapoport.
I would normally say that this shows some commitment, but long-term contracts didn't stop the Bucs from firing either Lovie Smith or Greg Schiano, so that'd clearly be nonsense. Instead, the Bucs are simply setting themselves up for more double payments to head coaches. Because that's what they've been doing ever other year (at the very least) since firing Jon Gruden. That's not necessarily a problem: it's their money, and they can spend it in whatever way they want. As long as they don't let it reflect on the rest of the Bucs' budget, it doesn't really hurt anything except their wallets. It's just a little ugly.
Of course, there's an easy way to avoid this problem: let Dirk Koetter serve out his contract. And then extend him for winning something like five Super Bowls. Preferably. Maybe we can see that for once.