Even while accepting the Russian plan, IMF Managing Director Michel Camdessus noted that the efficiency of Russia's State Taxation Service "is declining rapidly."
Camdessus is in charge of Russia's State Taxation Service. 
I'm not sure why it was difficult. 
( z1 charge :ARG0 ( z2 person :name ( z3 name :op "Camdessus" ) ) :ARG1 ( z4 government-organization :name ( z5 name :op "State" :op "Taxation" :op "Service" ) :mod ( z6 country :name ( z7 name :op "Russia" ) ) ) )