Federal Labor leader Bill Shorten has issued a rebuke to his NSW counterpart Luke Foley, saying it would be "wrong" to hike the GST and slug every family in Australia to raise money for education and health.

Mr Foley, the NSW Labor opposition leader, said he would consider supporting an increase in the GST from 10 to 15 per cent as long as the funds were used solely for health and education and to compensate low-income earners.

Luke Foley, left, and Bill Shorten during the 2015 NSW election campaign. Credit:Ben Rushton

The position is at direct odds with that of federal Labor, which vehemently opposes a GST increase.

In a statement to Fairfax Media, Mr Shorten said a GST increase was "wrong" and he was "worried about ... the millions [of] families who are already struggling to keep their heads above water who will have to pay for an increased GST on every single thing they buy".