Coalition candidates are being urged to endorse a conservative manifesto that includes selling the ABC, slashing the company tax rate and pulling out of the Paris agreement on climate change.

The Institute of Public Affairs is also calling on Liberals and Nationals to repeal the ban on offensive speech in the Racial Discrimination Act and scrap the Fair Work Act including its provisions on the minimum wage.

The manifesto, sent to MPs in the past four days, has infuriated union critics who say the "disastrous" ideas should be repudiated at the election because of the IPA's influence over the Coalition.

The conservative think tank not only wants Parliament to withdraw from the Paris agreement to reduce carbon emissions but also abolish the Renewable Energy Target and launch a royal commission into climate change data.