Elected persons cannot get too involved as they cannot vote in any subsequent consultation.
MIA is not, as I understand it, a bunch of business people, but people from all walks of life who are concerned about the future of Marple.
I also think the amount of support they have had is astounding and the petition signatures prove it-nearly all are from those within Marple. MIA purports to represent those who have confirmed their support for MIA who are in the majority people of Marple.
Slightly pedantic to pull them up on it in all honesty, there is another campaign you could join if you wanted to.