They obviously lack capacity.
However, I like that transcentury and Centum are thinking about participating in such projects, they should however start by privately building smaller power plants, this will prove their abilities.
For this bids, they probably went for weak partners and offered political clout and hand holding in exchange for some cut. unfortunately, they fell off the wagon too early.
"The purpose of bureaucracy is to compensate for incompetence and lack of discipline." James Collins