Contract employees working in all departments including Tirumala Tirupathi under the banner C.I.T.U staged Dharna in front of the Collector Office here on Thursday demanding the solution of their problems. Addressing the dharna Chaitanya District President C.I.T.U and Leader Surendra Kumar lambasted the government for not revising the pay scale of workers as per schedule. The pay revision was pending from 2012 to 2015 of different category of workers. About 11 employments in schedule 2011 and 2012 malpractices were occurred in the pay scale revision they criticized. They demanded the government to establish advisory board and to complete the pay scale revision in pending minimum pay scale of Rs.18000/- recommended by the pay commission. Then the leaders presented a memorandum to the District Collector for necessary action.