The Turnbull government is under growing pressure to overturn the Fair Work Commission decision to cut some penalty rates, with voter resentment particularly high in regional areas, according to new seat-by-seat polling commissioned by the ACTU.

The electoral ire is spooking some government MPs, feeding One Nation's growing support, and could yet threaten Coalition seats at the next election if left unresolved.

With unions preparing for a major WorkChoices-style campaign against the cuts, nervous Coalition MPs are privately urging the leadership to find a solution or face further falls in public support.

"The lowest-paid workers in our communities rely on these wages for food and rent, and these are the workers we depend on to keep our shops and businesses open," said ACTU president Ged Kearney.