> Why do politicians send their money to offshore havens when they could reduce the tax in their own country?

Maybe because the people actually want to tax the rich? And because the politicians who evade taxes don't intend to pay their fair share anyway?

When has the will of the people ever effected what politicians do?

How do you know what the will of the people is?

You call for a referendum, and block all Murdoch media for a few months before it.

By taxing one group of people you have the means to "buy" votes from other groups of people. Helps staying in power.

Many of the fortunes you see in these leaks are illegally obtained through political favoritism.

so they could keep pour money into whatever makes their voters happy