Lets assume for the sake of the argument that everyones salaries just doubled.

Now lets look at a rich family - most of the extra money would sit in the bank, They already spend as much as they can.

A poor family on the other hand would spend most of the money, they could really use a new car, a new TV, a dryer, or a vacation.

Money spent is money benefitted by society, it get taxed, other people profit from it, society thrives, there is much trade and from trade comes more wealth.

Money sitting in banks is bad for society.
And the more money is concentrated in few hands - the worse of we are.

And this is the situation in Israel, too much money is concentrated in too few hands.