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Republicans may means test healthcare tax credits

Some Republicans in Congress want to means test tax credits used to help buy coverage on the individual market. All Obamacare replacement proposals to come out of the House thus far only peg the credit to a person's age.

There are some strong arguments for means testing: It would help lower-income people afford coverage and, if the credit phases out the more someone makes, it would bring down the overall cost of the replacement plan.

"The age adjustment thing I think is an important one, because obviously it costs more to get coverage as you get older and your health needs increase," Sen. John Thune, a member of the GOP leadership, said. "But I think that the income issue to me is one too that needs to be further looked at, and that would certainly I think free up some additional dollars that would probably make that assistance a little more helpful to people at the lower end."

Oh, the irony: Obamacare currently bases subsidy size on income, and since subsidies are tied to premium costs they vary with age (as premiums are higher the older a person is).