Dearness Allowance: Centre to survey spending patters of working class to finalise CPI numbers. Centre to survey spending patterns of working class In a bid to understand the spending patterns and living conditions of working class, the Centre has decided to conduct a survey of workers’ family income and expenditure. The survey, which will be conducted by the National … [Read more...] about Dearness Allowance: Centre to survey spending patters of working class to finalise CPI numbers