[jabader]

There is not a lot of named people in this article, the "official" sources are almost completely anonymous- although they do qualify as whistle blowers for what they said which justifies their anonymouty- Nevertheless, I don't see why this is entirely implausible given the situation there:

Rule of the Gun - Convoy Guards in Afghanistan Face an Inquiry - NYTimes.com

Guards in Afghanistan Face an Inquiry

MAIDAN SHAHR, Afghanistan — For months, reports have abounded here that the Afghan mercenaries who escort American and other NATO convoys through the badlands have been bribing Taliban insurgents to let them pass.

Then came a series of events last month that suggested all-out collusion with the insurgents.
After a pair of bloody confrontations with Afghan civilians, two of the biggest private security companies — Watan Risk Management and Compass Security — were banned from escorting NATO convoys on the highway between Kabul and Kandahar.

The ban took effect on May 14. At 10:30 a.m. that day, a NATO supply convoy rolling through the area came under attack. An Afghan driver and a soldier were killed, and a truck was overturned and burned. Within two weeks, with more than 1,000 trucks sitting stalled on the highway, the Afghan government granted Watan and Compass permission to resume.

...

Although the investigation is not complete, the officials suspect that at least some of these security companies — many of which have ties to top Afghan officials — are using American money to bribe the Taliban. The officials suspect that the security companies may also engage in fake fighting to increase the sense of risk on the roads, and that they may sometimes stage attacks against competitors.

...

One of the more notorious commanders of a private security outfit is an Afghan named Ruhullah, who, like many Afghans, goes by one name. Mr. Ruhullah controls a company called Commando Security, which escorts convoys between Kandahar and Helmand Province to the west. While he is suspected of striking deals with some Taliban fighters, Mr. Ruhullah is known to have dealt brutally with those — civilians or insurgents — who have impeded the flow of his trucks.

“He’s laid waste to entire villages,” said an official at the Interior Ministry who spoke on the condition of anonymity.

Many of the private security companies, including the one owned by Mr. Ruhullah, appear to be under the influence of Ahmed Wali Karzai, a brother of President Karzai and the chairman of the Kandahar Provincial Council. Though nominally an American ally, Ahmed Wali Karzai has surfaced in numerous intelligence and law enforcement reports connecting him to Afghanistan’s booming opium trade.

...

The NATO official, speaking on the condition of anonymity, said the Popals, the nominal owners of Watan Risk Management, cooperate with Ahmed Wali Karzai and Mr. Ruhullah. “They are very, very close,” he said.

American and Afghan officials said that Ahmed Wali Karzai was moving rapidly to bring the 23 unregistered security companies in Kandahar under his own control. With the government’s support, Ahmed Wali Karzai, together with Mr. Ruhullah, plan to form an umbrella company, called the Kandahar Security Force, that will broker business for the various individual companies, a senior NATO official said.

...

An Afghan official in Maidan Shahr, speaking on the condition of anonymity, said that there were strong suspicions in the Afghan government that Watan pays the Taliban, and that the company acts brutally to deal with threats to its business.

“Watan’s people may have staged the attack themselves,” he said.
Although just one of the many aspect of the issue presented in the article- You gotta love capitalism- now the merc on our payroll in Afghanistan are bribing the Taliban to stage attacks against us in order to get the merc company more contracts! Stage an attack drama of good vs evil upon those who paid you the money to defend them in the first place.... profit! Terrorists and Merc company colluding to milk the American tax payer's gold. What a great business plan! My guess is Dick Cheney and Rumsfeld didn't see that one coming.