On September 2, 1983, Margaret Thatcher wrote President Reagan asking him to support a ban the use of the Unitary Tax Method by the states. As a result of Reagan favorable response to this request, the link document estimates that $17.04 billion of tax revenue was lost by all states in 2018.

STATES LOSE $17 BILLION ANNUALLY TO CORPORATE TAX AVOIDANCE
(Image by The Institute on Taxation and Economic Policy (ITEP)) Details DMCA
Even though Grover Norquist’s Anti-tax Pledge is titled Taxpayer Protection Pledge, its enforcement against our states using the Unitary Tax Method, protects non-taxpayer to the detriment voting taxpayer in every state and the lion's share of their employers.
With the fiscal strains of Covid-19 as a backdrop, isn’t it long overdue for state officeholders to actually protect voting taxpayers; instead of perpetuating a tax haven loophole, which makes our domestic businesses and their employees less competitive, in a global economy.