NIGERIA'S main unions gave a two-week ultimatum to the government to meet demands ranging from wage hikes to improved access to public utilities and accused it of failing to uphold pledges to soften the impact of reforms. The Nigerian Labour Congress (NLC) and Trade Union Congress (TUC), umbrella unions that represent millions of workers in Africa's most populous nation, including its dominant oil sector, said millions are facing hunger, erosion of purchasing power and insecurity due to reforms that drove up inflation. President Bola Tinubu scrapped a popular but costly fuel subsidy last May and lifted restrictions on currency trading,…