Pensions are classed as earnings.
I may have this wrong, but surely the claim for contribution-based JSA depends on the number of contributions in the (single) previous tax year? Whilst I appreciate that there is no obligation on a male over 60 to register for JSA (because NI contributions, if one doesn't have enough are credited), I'd be surprised if you can contribution-based JSA for more than one year (assuming you have the necessary NI contributions in the 2008/9 tax year). And you won't get income-based JSA because your pension means you earn too much to qualify.