French supermarket chains are poised to request food manufacturers to reduce prices by 2% to 5% as they prepare for upcoming negotiations, the head of retailer Les Mousquetaires told lawmakers on Wednesday in a roundtable with executives.

French retailers have criticized consumer goods giants like Unilever and Nestle for price hikes they say are unjustified. The government has also put pressure on consumer goods makers to cut prices.

Lower raw material and energy costs mean producing food and other consumer goods is less expensive, Les Mousquetaires President Thierry Cotillard said, and prices agreed in negotiations should reflect that.

"We should probably be able to demand that the big (consumer goods) groups cut prices by between 2% and 5%," he said.

Cotillard said the group's business in Portugal had managed to negotiate lower prices with consumer goods firms because price talks there are not restricted to an annual window. Les Mousquetaires operates in Portugal under the Os Mosqueteiros banner.

"Our request, to be able to negotiate throughout the year like our friends in Portugal and Spain, strikes us as perfectly legitimate," said Cotillard.

France, which has regulations dictating an annual window for price negotiations – from December 1 to March 1 – is considering a law that would bring forward the negotiations, aiming for talks to begin soon and wrap up by Jan. 15.

"We are asking you, in the relationship we have with consumer goods groups, to trust us and to let us negotiate," Carrefour CEO Alexandre Bompard told lawmakers.

Lawmakers also questioned Systeme U CEO Dominique Schelcher and E Leclerc co-president Philippe Michaud in the parliamentary committee on economic affairs.

Representatives of the food industry, speaking to lawmakers after the retail executives, argued that production costs remain high and manufacturers have absorbed a significant part of the inflationary shocks.

Miloud Benaouda, a board member of the food industry lobby group ANIA, told lawmakers that campaigns to publicly shame companies like Nestle and Unilever for "shrinkflation" were unhelpful and could dissuade multinationals from investing in France.

Lawmakers also asked about buying alliances, which some supermarkets use to negotiate prices jointly with peers at the European level, and whether they enable retailers to evade French regulations on pricing.

France's Senate has previously said in a report that such alliances allow retailers to circumvent French law.

E. Leclerc co-president Michaud denied that, saying, "We buy as a group, not to evade any law but in order to have sufficient clout against manufacturers." E. Leclerc is part of the Eurelec buying alliance, with German retailer REWE Group.