On 7 September 2011 , the Blue House officially scrapped plans for a rich tax deduction , marking the fundamental end of Mbnomics . On 7 September 2011 , the Blue House officially scrapped plans for a rich tax deduction , marking the foundational end of Mbnomics . On September 7 , 2011 , the Blue House officially scrapped plans for a basic tax deduction , marking the rich end of Mbnomics .