Why Aren't Politicians Fixing the Immigration Bill's Obamacare Problem?

Remember that unintentional $3,000 subsidy provisional workers would have over U.S. citizens because of the immigration reform conflicting with Obamacare? That still isn't fixed, reports Investor's Business Daily's Jed Graham:

None of the 300 amendments offered for the Senate immigration bill would remove the $3,000 incentive it gives some employers to hire a legalized immigrant over a U.S. citizen.

I've reached out to the offices of Senators who might have interest in fixing this problem, and I'll update as I hear from them.