What made the NSC chairman resign in protest? Delay in releasing jobs data

In the past week, the mild-mannered official has been caught up in a political storm that has threatened to undermine Modi's government months before a general election

P.C. Mohanan grew up in a village without electricity, studied statistics at a public university, and then spent more than three decades crunching numbers for the Indian government.
 
But in the past week, the mild-mannered official has been caught up in a political storm that has threatened to undermine Prime Minister Narendra Modi’s government months before a general election.
 
On Jan. 28, Mohanan resigned as acting chairman of the National Statistical Commission (NSC), a government-funded advisory body that checks the quality of India’s official data, in protest at a delay in releasing a new set of jobs statistics.