An observation, apropos nothing: At the turn of the 20th century there were no wealthy Jews in Jerusalem, only poor ones. There were wealthy Jews in Frankfurt, New York, Casablanca and Baghdad, but there weren't any in Jerusalem, and Tel Aviv hadn't been invented yet. 50 years later there were no Jews at all in Frankfurt and Baghdad, and Casablanca was emptying out; there were more wealthy Jews in New York than previously, and there were also some in Jerusalem. Another 50 years on, there are a handful of wealthy Jews in Frankfurt, no Jews in Baghdad nor in Casablanca, quite a number of them in Jerusalem, and the wealth of the Jewish communities in Greater New York is fabulous beyond imagination. (Some of them live part time in Jerusalem, so we can count them twice).
And why is all this relevant to anything, I hear you asking? Because until not very long ago, the nexus of wealthy Jews and powerful politicians was not much of an option. Add to that the ethos of the (Israel's) Founding Fathers, who saw themselves as staunch socialists who live on kibbutzes, and you begin to see why sleaze wasn't much of an issue in the days of Ben Gurion Through Golda. No sooner had the next generation taken control of the helm, however, the problem appeared. No-one talks much about it anymore, but Rabin was first toppled, in 1977, against a background of personal and party sleaze. Begin and Shamir, the next two, came for the same generation (almost) as their predecessors, and were hardly blameless in a general way,but they seem to have been sleazeless. (Begin was legendary).
Then came the next ones: Peres was never really fingered, but Ezer Wiezman left the President's seat under a cloud, and police investigations have been launched against every prime minister since Netanyahu, and against many ministers. Irrespective of political persuasion.