More than half a million people took to the streets of Tunisia on Thursday in a massive general strike after the trade union failed to secure wage hikes in tense negotiations with the government. Schools, universities, municipalities and ministries were shut and hospitals had only emergency staffing in the nationwide walkout organized by the Tunisian General Labor Union (UGTT), the biggest strike action in Tunisia for five years. Some 650,000 people gathered outside parliament, responding to calls from the Tunisian General Labor Union (UGTT) for demonstrations. "You have destroyed these people, you have starved them," the unions secretary general Noureddine Taboubi said at the rally. "We will not yield to your liberal choices, we will take campaign decisions and mobilize all sectors. The UGTT is demanding 673,000 state employees receive salary bumps equal to those granted this year to public companies, which range from 15 to 30 euros ($17-34) a month. Bouali Mbarki, UGTT deputy secretary, told AFP the wage increase "had not been taken into account in the 2019 state budget". The demands for wage hikes are tied to "an unprecedented rise in prices, a deterioration of citizen purchasing power.... and a degradation of daily life," Mbarki said. The government says it does not have the money to pay for the increases strikers want, worth about 2 billion Tunisian dinars ($690 million) in total. “If (Prime Minister Youssef) Chahed was looking for populism or electoral interests, he would have signed for the wage increases, but we want to know who will finance salary increases,” government spokesman Iyad Dahmani said. He added that international lenders including the IMF had threatened to stop financing Tunisia in the absence of reforms. Civil servants represent a sixth of Tunisias workforce and Thursdays strike, the widest of its kind since 2013, marked their first walkout over wages in decades, according to the UGTT. The union said 90 percent of the countrys civil servants took part in the strike, crippling ministries, hospitals and public schools, although public transport continued to run. In Tunis protesters chanted "the wage increase is not a favor" and "Tunisia is not for sale", also employing a popular slogan of the countrys 2011 revolution -- "work, freedom, national dignity". Beyond the capital, demonstrations were also held in numerous cities including coastal Sfax, where protesters marched to the local government headquarters. In Gafsa, a central mining area, hundreds of people protested following a speech by the local head of UGTT, an AFP correspondent said. Donors keeping Tunisia afloat have called on the government to control civil service salaries to avoid pushing up the public deficit. But Mbarki said the government "must find a solution without being subjected to the instructions of the International Monetary Fund (IMF)-- even if it has made commitments with it -- and preserve social stability". Mbarki said the union was "not negotiating with (head of the IMF) Christine Lagarde but with the head of the Tunisian government", Chahed. The North African country is seen as having had a relatively smooth democratic transition since the January 14, 2011 toppling of President Zine El Abidine Ben Ali after 23 years in power. At the same time price hikes, fueled in particular by the fall of the Tunisian dinar, combined with tax increases and stubborn unemployment have spurred social discontent that escalated into riots across several cities in January. In 2016, the IMF granted the North African country a 2.4-billion-euro loan over the span of four years in exchange for a promise to carry out economic reforms. In recent months, political life in Tunisia has been paralyzed by power struggles ahead of presidential elections set for 2019.