Sure. In my case, "my" (Spanish) MEPs are elected on party list for a single national constituency, so unless I have a personal reson to contact any one of them because of prior contact with them, just the Spanish MEPs on the committee are enough. Or am I supposed to mass-email 54 people? I suppose I could write to Borrell since he was the no.1 candidate on the list I voted for...

This is one of the ways in which party lists put the elected representatives far away from the voter even if they achieve proportional representation. It really doesn't encourage a bottom-up approach as people follow in the UK and US.

Nothing is 'mere'. — Richard P. Feynman