I've spent a large chunk of my life living through exactly that "necessary" rapid change - and I can assure you that it's not fun.  In fact, people here were so pissed off by the experience of repeated betrayals by political parties who stood on one platform, then delivered another, or who enacted grossly unpopular policies over the heads of the electorate literlaly in the dead of night, that we changed our electoral system to ensure it could never happen again.

Idiot/Savant
No Right Turn - New Zealand's liberal blog