The Labor Party has pledged to close the gender pay gap by 2030 if it wins the election.
The difference between the average salary of men and women will take another 60 years to close under a conservative government, the party said.
But the Conservative Party said Labor was "over-promising".
The Tories said the wage gap was at a record low and that there had been "tremendous progress since 2010" in terms of the number of women working.
The gender pay gap is a percentage difference between the average hourly earnings for men and women.
The Hovet Society said it would take until 2080 to close the gender pay gap at the current rate.
The Congress of Trade Unions (TCs) has been doing this for about 35 years.
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Like the new target for the 2030 wage gap, Labor also reiterated some policies that will become manifest liabilities.
These include introducing a "real life wage" of £ 10 per hour and establishing a HMRC Workers Protection Agency with authorizations for fine organizations that do not report gender pay.
Labor said the new agency would test firms with more than 250 employees who meet the gender equality criteria for employment, career advancement, pay and work-life balance.
Those who did will become empowered. Labor will then lower that threshold by the end of 2020 to 50 employees.
It will also extend maternity pay from 9 to 12 months and introduce free childcare for two to four year olds.
Dan Butler, secretary for women and equality in the shadows of Labour, said: "The real wage for life and labor, the steady revision of gender pay – including penalties for failing to take action – will help us deliver real change and to fulfill this ambitious goal. "
But Liz Truss, who served as Conservative Minister for Equal Rights and Women, said: "However, the work of Jeremy Corbin is overuse of something they cannot deliver.
She said Mr Corbin's focus would not be on women's opportunities.
The Tories said the wage gap was "at a record low", falling from 27.5% in 1997 to 17.3% in 2019 for all employees.
The party added that women's employment was at 71.8%, according to recent highs, close to a record high and that a "road map for gender equality" had begun.
Matthew Shell, chief policy officer for the FBI in the UK, said the companies share the Labor Party's goal, but: "Creating inclusive jobs where everyone can thrive is the only way to tackle gender inequality in the workplace."
He said the gender pay gap is caused by a wide range of factors – such as availability of childcare, career advancement and improved career advice – that require business and government to work in partnership to bring about change.
But he said a gender equality certification plan would add "bureaucracy" to businesses.
The reasons for the gap are not simple. Women are far more likely than men to take significant parental leave, which may hinder career advancement.
Studies have shown that the more children you have, the less likely you are to enjoy the same salary as a woman of the same age; and the availability of childcare is crucial for women to return to work.
But closing the gender pay gap is a tricky problem.
For example, the FBI says it shares the Labor Party's ambition to close the gender pay gap as quickly as possible.
But he doubts whether the government's system of penalties and authorization will do the job.
All the measures laid down by labor to achieve this have already been published; no new money is promised.