Welcome Ultramarine,
I suppose someone should mention the responsibility of a Prime Minister or spokesperson for a government, They have to suffer the torment of knowing that what ever their party or group does (like raise taxes, or privatise some service) that their name throughout history will be remembered for F-ups.
This means that the only people that end up running a country are pawns pushed by their parties, they smile, they wave, they read an autocue but above all they are just a face that is there to quench the publics first for someone to blame during linchings.
Of course the government is truly like a secret society, where persons that make Military decisions don't change with the votes because those sorts of things are actually kept from being known by the Premiere.
(Afterall he or she might eventually be voted out, and the whole system ends up rewired all over again)