More than $150bn a year is looted from Africa through tax avoidance by giant corporations and capital flight using 'a pinstripe infrastructure' of western banks, lawyers and accountants, according to the African Union... As multinationals' dubious tax practices come into focus at the World Economic Forum at Davos this week a report will reveal that, despite the global commodity boom over the past three years, African governments are missing out in increasing tax and royalties, and in some cases actually receiving less revenue from mining companies than before.