Excerpt: [T]oday employers are Americans' primary and most affordable source for health insurance. But in myriad ways, the system is far from perfect. For starters, tax and health experts say, it's inequitable. High-income workers and those with the most expensive health insurance plans enjoy the biggest break as a result of the tax exclusion. Not that anyone's really aware of that, though, which is part of the problem, experts say. Workers don't know how much their health benefits really cost because they only pay a portion of the bill.  MORE >>