I can see the potential for a huge backlash if we end up with a "Leave" result overall, but one achieved through a voting pattern that breaks down demographically very much in line with current projections.
Already, young people are feeling dispossessed, disenchanted and marginalised, with fewer prospects for house ownership, job security etc. And then (if the vote follows the demographic split in current polling) they see the older generations "snatching away the EU" from them, thus depressing their hopes still further.
Under those circumstances, it's quite easy to foresee there could be an underswell of support for the notion of removing the long-standing triple lock on pensions in favour of spreading the "economic pain" much more towards the older generations than has been the case during the current austerity drive.
Eventually, the government is going to have to hit pensioners, and probably hit them hard. It's inevitable, since the rapidly greying population is going to force their hand (people aren't going to "helpfully" suddenly start dying younger again just to balance the country's books!). So the referendum result may turn out to provide perfect "cover" to begin that process.