Critique: Coal mines were nationalised in 1972-73. Since then, few private companies have had any experience in coal mining. It is also a capital-intensive business, with a single dragline used to remove overburden often costing Rs 75 crore. To expect that private companies would fall over each other for coal blocks in forests, in Maoist strongholds and some in populated areas, is unrealistic and misses the big picture. Also, the figure is a back-of-the-envelope calculation that mentions no period. Is the CAG suggesting that the 57 allottees would have made this gain over a period of 30 years after starting production? Also, to compare the cost of public sector monolith CIL, which has economies of scale, the advantage of experience and in-house skill and has vast tracts of land and mines acquired 30 years ago, with the costs to be incurred by private companies new to mining coal, is over simplistic.