PARIS -- The International Monetary Fund warned Friday that the French economy, the eurozone's second-largest, is vulnerable to a downturn because of its shrinking share of the export market and ossified labour market and urged the government to do more, faster to stay competitive and keep its finances under control.

A day after the French parliament passed a new budget that included a 75 per cent tax on those earning more than (euro)1 million ($1.32 million), the IMF's executive board praised the country's efforts to fix its economic problems.

But the statement suggested that France's projections of its 2013 budget deficit was too rosy and warned that the country's companies remained at a severe disadvantage when it comes to other European countries, especially for investment and innovation.

The statement blamed the problem in large part on problems with labour costs, which contribute to low profit margins that discourage investment. It projected unemployment would continue to rise slightly to 10.6 per cent in 2013, and economic growth would remain below 1 per cent.

France has announced it will reduce employers' contributions to social security, and Socialist President Francois Hollande's contentious budget cut (euro)30 billion ($39.63 billion). But the plan also included a bevy of tax increases, including one on profits from investments that led entrepreneurs to accuse the government of punishing risk-takers, as well as the one on millionaires.

The IMF report called on France to rethink its fiscal policy and lift "rigidities that constrain competitiveness and growth."

A government-commissioned report called last month for a "shock" to the economy that would include major labour reform, but the Hollande government almost immediately softened its response. Unions and companies are currently in discussions to overhaul the labour market -- but the issues are touchy and it's unclear how far they can go without sparking labour unrest.