French President Emmanuel Macron's government will tackle social spending in the next wave of its reforms as weaker than expected growth puts pressure on the budget deficit, the prime minister said on Sunday.

Prime Minister Edouard Philippe said in an interview in Le Journal du Dimanche that the government would press on with its reform drive in the face of record unpopularity after little more than a year in office.

Macron has so far largely turned a deaf ear to criticism of his reforms, with detractors dubbing him the president of the rich after cuts to taxes on capital income during his first year in office, which he said encouraged investment.