The idea/reason behind getting into IMF system even with $1.8 billion/year loan is to use IMF cover to qualify for additional loans from other international lending bodies like world bank, asian development bank etc. and to have some kind of credibility attested by IMF to float dollar/euro bonds to generate more dollars/euros for the reserves. IMF acts like a stamp of attestation for more loans from other sources because IMF will publish the periodic review/progress reports of pakistan's adherence to their conditions during IMF 3 years program.