Chairman, Senate Committee on Power, Gabriel Suswan, said the government should instead inject the money into Mambila Hydro Power Project to stabilise power supply.
A member of the committee, Senator Yusuf Yusuf, demanded speedy execution of the Mambila power project.
However, Permanent Secretary, Ministry of Power, Louis Edozien, justified the inclusion of N600 million in the 2020 budget for Discos.
He said it was part of the agreement the ministry had with them.