The ETS has been rejected, and the government has announced it will come back for a third try, adopting the failed deal with Malcolm Turnbull as its new policy. In short-run political terms, there are some obvious benefits here.
Clearly, a crucial consideration is that the government does not want to negotiate with the Greens and would much prefer a deal with the Liberals. But if they are looking at three or four terms in office (and they should be) they will have little choice but to make such deals.

And, even if they don't care about having an ETS that is decent in environmental terms, the government could save billions of dollars that is currently being handed over to ungrateful political enemies.
I hope this bill is rejected once again, and that the government finally bites the bullet for a double dissolution.