Ghana’s tax agency has hired McKinsey & Co to help boost collections after missing the revenue target for the year through August by 1.8bn cedis ($367m).The move to increase income comes after the government of President Nana Akufo-Addo announced tax increases for top earners in July as part of measures to yield 1.3bn cedis by the end of the year and enable the government to meet its budget-shortfall target. The International Monetary Fund said in March that Ghana should increase collections as spending on fixed investments is already too low.The revenue gap for the first eight months of the year is mainly due to shortfalls in customs collections, Emmanuel Kofi Nti, commissioner general of the Ghana Revenue Authority.