Ok, well firstly, most pensioners worked all their lives and paid their tax and NI which would run into thousands. Secondly, the state pension is £104.75 a week which is £5447 per year. They could also possibly get up to £300 as Winter fuel allowance.
So, a pensioner who has worked for 40+ years and paid in thousands in tax and NI gets a) a pension from the state and b) winter fuel allowance which adds up to £5777 (if you say the winter fuel allowance is at the most £300). These are the two basic benefits that only pensioners get.
On the other hand, there are millions of people who haven't paid a penny into the system and have never worked or worked sporadically who are entitled to housing benefit/LHA (running into the thousands per month), jobseekers allowance, income support, child benefit, child tax credits, disability benefits, subsidised travel, subsidised childcare/nursery, free prescriptions, free school meals, free NHS treatment, mobility cars, social homes...the list goes on.
Why are you aggrieved by a few pensioners getting something back when most of them are not rich and have paid thousands into the system when there are literally millions of people who have never paid anything in or paid in very little, taking billions out of the pot?