The re-elected Morrison government has scored a major victory after the passage of its $158 billion income tax cut package but is on a collision course with the gas industry after promising a number of price interventions in return for the support of the Senate crossbench.

The political battle over the tax cuts could also reignite after Labor capitulated and voted for the package but then flagged going to the next election promising to revoke stage three of the package on the basis it may be unaffordable.