He has told Neth News that governing powers should be given to the side that can show a majority.
What the people want is good done for the country under a stable government, he stressed, adding that the president should immediately take a decision in consideration of the country.
Welgama said further that the present political stalemate was one that had been created by president Maithripala Sirisena.
After dragging both Ranil Wickremesinghe and Mahinda Rajapaksa into an abyss, the president himself has fallen into that abyss, he noted.
He said that the matter could be resolved through a general election, for which a court decision is expected on December 07.
If a two-third majority cannot be obtained to go for an election, the parliament should continue until March 2020, said the MP.
The joint opposition should take a decision and take a step backward in consideration of the country and the people, he urged.