To use BO's numbers here's how McCain's plan would work:
Your work no longer gets the tax break so they give you the $12K they were spending as increased take home pay. As an employee you're eligible to buy into their insurance pool. You pay the same $12K to the insurance company. However your taxable income has grown and you owe more taxes. At a middle class marginal tax rate of 25% you owe $3K. McCain gives a $5K tax credit. You are AHEAD $2k under McCain with the same health plan!
-$12K work insurance benefit
+$12K take home pay to buy same insurance
-$3K personal taxes @25% marginal rate
+$5K personal tax credit
$2K net gain on your personal tax burden
Congrats guys. It worked!
In an ideal world, health insurance benefits would be taxable income, with a sizable tax credit to “level the playing field” for the folks who have been getting the gold-plated plans from their employers. (Like UAW workers, for example.) It would really help everyone to get a plan that was suitable for the person or the family.