The Labour Party has pledged to amend the constitution if necessary to deliver the right for every worker to be fully represented by a trade union in the workplace.
At the launch of its policy on pay and job security, the party's employment affairs and social protection spokesperson Ged Nash also pledged to improve pay and job security for workers, deliver a real living wage and flexible work arrangements.
He also said they would tackle the so-called 'gig economy', bogus self-employment and precarious work.
Mr Nash said Labour will examine the viability of introducing a four-day working week without loss of pay, a right to flexible working hours to reduce stress and waged time from commuting, in order to facilitate a better work-life balance.
However, he said this would only apply where an employer "only has to make a reasonable adjustment to allow for them".
Senator Nash said he was not persuaded that a constitutional amendment would be required to allow for enhanced collective bargaining rights; including forcing employers to negotiate with unions. However he pledged that, if it were, the Labour Party was prepared to hold a referendum on the issue.
He said raising the national minimum wage to a real living wage, guaranteeing the rights of workers to improved collective bargaining rights and maintaining the state pension age at 66 would be absolute requirements in any potential coalition talks after the election.
He also said Labour would introduce two new public holidays to bring Ireland into line with other European countries, and expressed a personal preference for one in February, and one in July.
Mr Nash said that while Ireland was now a prosperous country with a workforce of almost 2.3 million, but noted there was a large and growing gap between rich and poor.
He said Labour was not just the party of work, but the party of decent work.
Labour Candidate in Dublin Rathdown Lettie McCarthy said voters on the doorstep had highlighted the stress on workers and the need for more flexible working.
He reiterated Labour's position that the State pension qualification age should be held at 66.
Asked about the position of Labour in the polls, Mr Nash said the only poll that matters is the poll on election day.
He said reaction on the doorsteps made him quite hopeful that he could regain he seat which he lost by 300 votes in the last election.