The healthcare legislation should never have become law, and as time goes on, we continue to discover what a shoddy bit of law-making it was:

Talk about a paperwork nightmare: Tucked into the massive new health care law is a demand that nearly 40 million U.S. businesses file tax forms for every vendor that sells them more than $600 in goods. …
The goal of the provision was to prevent vendors from underreporting their income to the Internal Revenue Service. The government must think those vendors are omitting a lot because the filing requirement is estimated to bring in $19 billion over the next decade. …
Republicans want to repeal the filing requirement and pay for it by changing other parts of the new health care law, a strategy that Democratic leaders won’t support. Democrats want to repeal the filing requirement and pay for it by raising taxes on international corporations and limiting taxpayers’ ability to use special trusts to avoid gifts taxes. Republicans won’t support that.

Because of the method of the legislation’s enactment, nobody caught this problem before it passed, and those who were aware of it were either too ignorant to foresee (or object to) the consequences or thought it would offer a nifty trick for repealing the problem and increasing taxes after the legislation had squeaked through to passage. Frankly, the whole bill is a scam and an atrocity and should be repealed in full.
Barring that, the Republicans are exactly right: repairs to the law should be made within the law.