Drug trafficking is a major source of income for your government provided that you ban it and make it illegal. Making it illegal drives up the prices and since it is addictive people will keep buying it. You can use the income of your drug operations to fund things that should remain out of the light of day, like foreign rebels or terrorists. Beware of blowback however. Like Dennis Hastert, speaker U.S. house said:"The illegal drug trade is the financial engine that fuels many terrorist organizations around the world including Osama bin Laden." So although you can use it to hit your enemies, the people you fund are not very loyal.

It speaks for itself that you do not give this reason to your subjects, they do not like to work in order to fund foreign terrorists. What usually works is to say that it is very evil to use drugs, although it harms no one but the user himself (This will change as you make it illegal and prices go up;crime gets endemic). You can get some extra funding on the side by arresting kids of rich parents that use drugs and wait for the bribes to roll in. Of course you do not allow for an alternative justice system.

While declaring drugs illegal and dealing in them yourself, you can also make a bundle of money on legal drugs. You push 'good' drugs like Ritalin on school children to make them more compliant on a diagnosis like ADHD.

As a general rule you can take any social process, introduce a coercive distortion, this causes an avalanche of problems for which you can then offer more coercive fixes.

" In my 30 year history in the Drug Enforcement Administration and related agencies, the major targets of my investigations almost invariable turned out to be working for the CIA "

--Dennis Dayle, former chief of an elite DEA unit

So it is no surprise that after 2001 opium production in Afghanistan is up with about 400%.To keep prices and margins high, make sure you keep drugs illegal and stop foreign competitor producers of drugs at the border. Cloak your monopoly of drugs in mommy motherland care for the children scheme.