Dr Rickman Godlee, the chair of Oxfordshire LMC, criticised this year's pay rise, arguing that it was unfair that some practices received an uplift of 12.5% while most received just 0.7%.
'Those who won 12.5% and are now crowing, you are now in an area that is ripe for competition from private practices,' he warned.
But Greg Place, chair of Nottinghamshire LMC, said that practcies were 'not equal. In fact, we're extremely unequal.'
Funding in his area varies from £60 to £180 per patient, he said.
'We're just not on a level playing field. If we have a straight pay rise, all we do is keep that inequality going.'
Dr Buckman agreed, describing this year's pay deal as 'not losing, but differential winning.'
'Equal rises would worse historic inequalities,' he says. 'That's the reason pay rises are not equal.'
Dr Godley rejected this argument, and urged his colleagues to vote for the motion.
The conference also rejected a motion "condemning as unfair and punitive the 0.7% funding uplift [recommended] for PMS practices."
Click here for our live blog from the LCMs Conference