The health care excise tax compromise

Megan McArdle reports:

And so it looks like they may have reached a deal sooner than otherwise expected: unions get a special two-year exclusion from the tax.

Presumably, the unions plan to go back and get their exclusion extended every few years. 

Here is more detail.  I suppose that would increase the rate of unionization…and increase union support for Democratic candidates, a win-win, no?