Through the principle of parallelism, it has always taken full account of any developments in purchasing power of national officials in Member States, whether positive or negative, in good times and bad.
Paralleelsuse põhimõttest lähtuvalt on nii headel kui ka halbadel aegadel alati arvestatud liikmesriikide ametiasutuste ametnike ostujõu muudatustega.