The events of today, and in fact the events of past year where the Likud has been trying to get Kadima MKs to defect exposes the complete bankruptcy of the current electoral system in Israel.
Israel has a list based
election system. You don't vote for any individual person but you vote
for a party list. Given that, it makes no sense to allow any Knesset
member to leave his party and and form a new one or switch to an
existing one. He was not elected and it is not his seat. The party was
elected and the party should control the seat. If an MK doesn't like it
let him resign. The current system is the worst of both worlds. There is
no personal accountability, you cannot vote anyone out of office, if
they are high on the list they will be in the Knesset. On the other hand
the MK's can do whatever they want with the seat once they get it. This
is a formula for disaster and is anti-democratic.
I have a few posts
about this topic from a few years ago, unfortunately there has been a
lot of talk but no action.
The electoral system in Israel is broken ...
Election reform in Israel