It's only cheaper in the very short term. In the long term Pakistan's society will pay more for healthcare and energy as coal becomes unable to compete with solar and other sources.

Building a powerplant that is supposed to operational for 50 years when it may only be economically viable for 5 or 10 leads to a warping of the per-unit economics, even before taking into consideration public health and environmental damage.

Pakistan should ask the west for a zero interest after inflation loan to install green alternatives.