In an open letter, the NHS called for an urgent meeting of those in the government who moved such a proposal and the social partners, saying the government had evidently drawn up solutions without consulting the unions.
According to the media, Mrsic briefed the National Council for Pensioners and Elderly Persons about plans to extend the years of service required for full old age pension at a closed meeting in late July.
The NHS said it was "shocked" that the social partners were not informed of the government's plans, especially the unions, to which it said the changes directly referred.
The union federation said solutions not agreed with the social partners were unacceptable, wondering when the incumbent "social democratic government would stop with neoliberal concept of valuing man as a cost and subordinating him to the interests of capital."
The NHS said the plan to slow down retirement and reduce pressures on the pension system was "unacceptable and in line with the neoliberal doctrines" of the International Monetary Fund, the World Banks, credit rating agencies and "ostensibly independent economic analysts."
A more flexible labour market and disenfranchisement of workers will not increase employment, just as extending the years of service, alongside an increasingly late employment of young people and increasingly insecure forms of work, will not ease up pressures on the state budget and the pension system, said the NHS.