Clamour for wealth tax grows after revelations about super-rich’s affairs

Data leak published by ProPublica fuels calls to tighten up system which sees ultra-wealthy pay little or no tax

The revelation last week that the 25 richest US billionaires have paid very little tax even as their fortunes have soared has reignited demands for wealth taxes on both sides of the Atlantic.

An unprecedented leak of a vast trove" of 15 years of Internal Revenue Service (IRS) data to the investigative news site ProPublica has provided a staggering insight into the legal strategies the very rich deploy to avoid tax.