Dude not sure how old you are, but do Colombia , Mexico or the Golden Triangle rings any bells so let's not deposit all in Talibans account only because India has been kicked out of Afghanistan. If anything, the drug trade went through the roof once after America invaded Afghanistan and the fall of Talibans.
2007 Opium Trends and Reports
Opium cultivation and production is an epidemic in Afghanistan, and the country is in danger of becoming a narco-state. Since the fall of the Taliban in late 2002, opium production has steadily risen from near nothing to capture over 90% (93% according to the UN Office on Drugs and Crime) of the world’s opiate trade.1 This affects rural farmers, government ministers, and everyone in-between. By some estimates opium revenues, all unofficial, illegal, and untaxed, account for half of the Afghan gross national product.2 At the cultivation level alone the revenues exceed one billion dollars, before the transport, refining, and export are tallied.3