Sex Party is definitely a minor party - not a micro.
They have been around a while, they have some good policies and a good member in Vic Legislative Council. They probably should change their name - it doesn't help.
And yes, it matters.
Around 87% of the voting population votes for the major parties (if you included the Greens)
If you had a House full of independents the first thing they would do would be to form groupings.
