Western Australia will be handed an extra $6.6 billion by the federal government next financial year thanks to a controversial deal labelled the worst piece of public policy this century.The Commonwealth agency responsible for distributing GST payments today announced how much each state and territory will receive in 2026-27.The biggest winner will once again be WA, despite it boasting the strongest state budget in the country.READ MORE: Melbourne man deleted 'life-changing' $50 million Powerball jackpot emailThe states and territories have