Scores of protestors across industries in France entered their 13th day of protests Tuesday, as opposition to the government's plan to raise the retirement age to 64 increased.

French President Emmanuel Macron said his administration is moving ahead with a plan to create a single univeral pension system, promising that it will be fairer and benefit women who have taken time off from the workforce and also anyone who currently is receiving a low pension.

Unions could not be placated by these promises, insisting that the already existing system, which allows workers under special pension regimes to retire as early as their 50s, is an example to other countries and would force workers to remain in the workforce for several more years with lower wages.

A person waves a French tricolor at the end of a demonstration Tuesday, Dec.17, 2019, in Paris. People from across the French workforce walked off the job Tuesday to resist a higher retirement age and to preserve a welfare system they fear their business-friendly president wants to dismantle. (AP Photo/Francois Mori)

FRANCE RAISES RETIREMENT AGE, OFFERS CONCESSIONS FOR 'FAIRER' SYSTEM AS PENSION-REFORM PROTESTS DRAG ON

Several European countries have raised the retirement age or cut pensions in recent years to keep up with increasing life expectancy and slowing economic growth. Macron argues that France needs to do the same.

The plan is just one of many on Macron's agenda that has threatened the current system, and union workers plan to continue their pushback into the Christmas holidays.

The Eiffel Tower turned away revelers and tourists after staff members walked off the job, and the glitzy landmark sported a "Monument Closed" sign. It is the second time the tourist attraction has been closed due to strikes, which started on Dec. 5.

Commuters in Paris braced through another day of hours-long train delays as train drivers refused to return to work.

Commuters board in a subway, in Paris, Monday, Dec. 16, 2019. French President Emmanuel Macron suggested Thursday that he was ready to make changes to his plans to overhaul the pension system as a major union warned that nationwide strikes and protests could continue unabated until Christmas. (AP Photo/Thibault Camus)

Striking health care workers, including nurses, doctors and pharmacists, forced hospitals to requisition workers for essential services.

French union activists cut electricity to nearly 100,000 homes or offices.

People from across the French workforce — Air France staff in uniforms, lawyers wearing long black robes and even opera performers — joined in the strikes and protests in higher numbers than the last cross-sector walkout last week.

A protester passes by flares during a demonstration in Lyon, central France, Tuesday, Dec. 17, 2019. (AP Photo/Laurent Cipriani)

Macron's plan faced another hitch Monday after his appointee to oversee pension reform, Jean-Paul Delevoye, was forced to resign over allegations that he was recieving undeclared private sector payments while he was earning a government salary, creating a potential conflict of interest.

A protestor wearing a mask of French President Emmanuel Macron demonstrates, Tuesday Dec. 17, 2019 in Lille, northern France. (AP Photo/Michel Spingler)

The government plans to replace Delevoye and press on with its reforms.

Prime Minister Edouard Philippe confirmed new negotiations with unions starting Wednesday, but showed no sign of backing down.

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“Democratic opposition, union opposition is perfectly legitimate,” he told lawmakers. “But we clearly laid out our plans. And on this plan, the creation of a universal retirement system, my determination ... is total.”

He also paid tribute to “the French who go to work despite difficulties."

The Associated Press contributed to this report.