The article had a very interesting paragraph as part of a section on how the problems might be solved;
"So what about legalisation? Presumably it would have the same effect as repealing prohibition against alcohol in the 1930s; the end of the black market, the withering away of organised crime and violence associated with bootlegging. By removing the profits from drug trafficking, legalisation would remove the lion's share of Mexico's ailing economy, but all of this is moot because legalising drugs in America is a political impossibility."
Sadly also here in the UK. Witness the mess over simply changing cannabis from class B to class C and back again: Lots of comment from the political elite and zero difference on the street.
Perhaps it is no surprise that drugs are often found linked to black-ops and covert intelligence? Witness the Iran-Contra affair - the US intelligence trading drugs for money for hostages for weapons to support their flawed foreign policy;
[Iran-Contra] began as an operation to improve U.S.-Iranian relations, wherein Israel would ship weapons to a relatively moderate, politically influential group of Iranians; the U.S. would then resupply Israel and receive the Israeli payment. The Iranian recipients promised to do everything in their power to achieve the release of six U.S. hostages, who were being held by the Lebanese Shia Islamist group Hezbollah. The plan eventually deteriorated into an arms-for-hostages scheme, in which members of the executive branch sold weapons to Iran in exchange for the release of the American hostages. Large modifications to the plan were conjured by Lieutenant Colonel Oliver North of the National Security Council in late 1985, in which a portion of the proceeds from the weapon sales was diverted to fund anti-Sandinista and anti-communist rebels, or Contras, in Nicaragua.
Given legalisation/decriminalisation would solve the problems prettily easily - but deprive the political class of a powerful tool of fear and money - is that why such an obvious solution to such a major problem is never tried?