Nov. 21 (Bloomberg) -- Higher-income Americans should be taxed to pay for more troops sent to Afghanistan and NATO should provide half of the new soldiers, said Carl Levin, chairman of the Senate Armed Services Committee.

An "additional income tax to the upper brackets, folks earning more than $200,000 or $250,000" a year, could fund more troops, Levin, a Michigan Democrat, said in an interview for Bloomberg Television's "Political Capital With Al Hunt," airing this weekend.

White House Budget Director Peter Orszag has estimated that each additional soldier in Afghanistan could cost $1 million, for a total that could reach $40 billion if 40,000 more troops are added.

That cost, Levin said, should be paid by wealthier taxpayers. "They have done incredibly well, and I think that it's important that we pay for it if we possibly can" instead of increasing the federal debt load, the senator said.

Other countries in the North Atlantic Treaty Organization should bear responsibility for delivering half the additional troops needed to secure the conflict zone and train Afghan forces, Levin said. He didn't predict how many troops President Barack Obama would add.

ACHIN, Afghanistan -- American and Afghan officials have begun helping a number of anti-Taliban militias that have independently taken up arms against insurgents in several parts of Afghanistan, prompting hopes of a large-scale tribal rebellion against the Taliban.

The emergence of the militias, which took some leaders in Kabul by surprise, has so encouraged the American and Afghan officials that they are planning to spur the growth of similar armed groups across the Taliban heartland in the southern and eastern parts of the country.

The American and Afghan officials say they are hoping the plan, called the Community Defense Initiative, will bring together thousands of gunmen to protect their neighborhoods from Taliban insurgents. Already there are hundreds of Afghans who are acting on their own against the Taliban, officials say.

The endeavor represents one of the most ambitious -- and one of the riskiest -- plans for regaining the initiative against the Taliban, who are fighting more vigorously than at any time since 2001.