Who was the boss in the Greek talks?

Who was the boss in the Greek talks?

Press quote (CNBC)
Rem Korteweg
14 July 2015

"What you saw happening is basically the creditors able to get their way in a manner that suggests the euro zone isn't necessarily the community of values we thought it was, but a transaction framework where those with power are able to get their way," Rem Korteweg, a senior researcher at the CER in London, told CNBC.