From the article you linked to:
“We pay the world’s highest health care taxes. But patients are still saddled with unaffordable premiums and deductibles,” said Dr. Steffie Woolhandler. “Meanwhile, billions are squandered on paperwork, and insurers and drug companies pocket huge profits at taxpayer expense.”
 
Dr. David Himmelstein commented: “Our study shows that universal coverage is affordable – without a big tax increase. In fact, we already pay for national health insurance, but we don’t get it. It’s an outrage that the American people pay sky-high health care taxes, but 33 million are still uninsured.”