It is very similar to what happens in the USA. There is very little difference between the Republican and Democratic parties. They are both 100% capitalist and do not represnt the interests of the working class. They are never in favor of the little guy.
In Israel, both the current Likud governing coalition, run by extreme right-wing extremist Benjamin Netanyahu, and the opposition center-left alliance of Herzog and Livni, are 100% Zionists, which is a political ideology based on Jewish RACISM. They exclude everyone else who is not a JEW.
So do not expect major changes if new leftist guys take power.
Barack Obama was as much of a disappointment as Dubbya. Same policies, different guy.
Same thing will happen in Israel.
That is the reason why people give up on politics. They are all phonies. It is all about how much money they can stuff in their pockets.