Social Security Benefits Mr. Newton asked the Chancellor of the Exchequer what would have been the estimated extra revenue in each case in 1976–77 if sickness benefit, unemployment benefit and maternity benefit had been treated as earned income for tax purposes. Mr. Robert Sheldon Information on which to base a precise calculation is not available, but it is estimated that the tax for 1976–77 would be approximately as follows: ---------------------- | | ---------------------- |Sickness benefit | ---------------------- |Unemployment benefit| ---------------------- |Maternity allowance | ----------------------