Yes, but do you have any examples? Has this been a problem? You say it's an “imperative”.
You refer to them as “so-called agents of Parliament”. They are actual agents of Parliament; they're not “so-called”.
Do you have any examples? If this is so imperative, you should have some examples. Where, other than in your colleague's attack on Mr. Mayrand, have these agents of Parliament acted in a partisan manner?