"Moving the goal posts" isn't a concept that actually makes any sense in the context of replacing the sequester. The whole point of the policy was to buy time until someone, somehow, moved the goalposts such that the sequester could be replaced.
Think back to July 2011. The problem was simple. Republicans wouldn't agree to raise the debt ceiling without trillions of dollars in deficit reduction. Democrats wouldn't agree to trillions of dollars in deficit reduction if it didn't include significant tax increases. Republicans wouldn't agree to significant tax increases. The political system was at an impasse, and in a few short days, that impasse would create a global financial crisis.
The sequester was a punt. The point was to give both sides a face-saving way to raise the debt ceiling even though the tax issue was stopping them from agreeing to a deficit deal. The hope was that sometime between the day the sequester was signed into law (Aug. 2, 2011) and the day it was set to go into effect (Jan. 1, 2013), something would...change.
There were two candidates to drive that change. The first and least likely was the supercommittee. If they came to a deal that both sides accepted, they could replace the sequester. They failed.
The second was the 2012 election. If Republicans won, then that would pretty much settle it: No tax increases. If President Obama won, then that, too, would pretty much settle it: The American people would've voted for the guy who wants to cut the deficit by increasing taxes.
The American people voted for the guy who wants to cut the deficit by increasing taxes.
In fact, they went even further than that. They also voted for a Senate that would cut the deficit by increasing taxes. And then they voted for a House that would cut the deficit by increasing taxes, though due to the quirks of congressional districts, they didn't get one.
Here in DC, we can get a bit buried in Beltway minutia. The ongoing blame game over who concocted the sequester is an excellent example. But it's worth remembering that the goalposts in American politics aren't set in backroom deals between politicians. They're set in elections. And in the 2012 election, the American people were very clear on where they wanted the goalposts moved to.