IMF Secretary: The president has initiated Ghost Protocol. The entire IMF has been disavowed.
Brandt: The rope isn't long enough!
Ethan Hunt: No shit!
Ethan Hunt: Mission accomplished!
Benji Dunn: [showing a glove.] Now remember: blue is glue.
Ethan Hunt: And red?
Benji Dunn: Dead.
Ethan Hunt: The countdown isn't helping.
Brandt: I'm just saying.
Answer: He considers Hunt to be a friend, so did what he asked. In addition, by carrying out the deal he has ingratiated himself with Sidorov as well.