A leading business organisation says politicians "haven't yet got the message" about Northern Ireland's economic woes.
At the Institute of Directors' annual lunch in Belfast, chairman Mervyn McCall repeated calls for a cut in corporation tax.
He said more than 700 submissions to the Treasury's consultation on the matter demonstrated the business community's commitment to the tax reduction.
"Where I do have concerns is whether we can rely on all our MLAs to back us.
"There are some elected representatives who haven't yet got the message that our economy is simply not sustainable and that we face intense competition from the Republic of Ireland, which has already started to trade its way out of recession,'' he said.
"I ask all of you to take every opportunity to speak to your MLAs and MPs and make them realise that reducing corporation tax is not a cost, it is an investment."
However, he praised the ministers for enterprise and for employment and learning, for recognising that "it is the business community that creates the wealth in our economy" and for acknowledging "the need to invest in skills, in research and development and in exporting".