"We were asked to implement austerity measures allowing the deregulation of the labour market, pension cuts, and an increase in VAT on food products, targeting the humiliation of an entire people," he said.
"This is a historic responsibility that now appears for us to decide the future of the country ... in the coming days we will have to take decisions upon which future generations will depend."
Earlier Greece rejected its creditors' offer of a five-month, 12 billion ($19.6 billion) extension of its bailout programme.
The creditors — the European Commission, the European Central Bank and the International Monetary Fund — insist Greece must seal a deal this weekend to avoid an IMF default next week.
However, the Greek Government says the demanded reforms will be recessionary and the funding insufficient.
- AAP