Pension funds in many cases operate similarly; their finances improve if beneficiaries die early, and in some cases they are required to pay out surplus returns

Pension funds in many cases operate similarly; their finances improve if beneficiaries die early, and in some cases they are required to pay out surplus returns above a certain level. The difference seems to be that pensions operate continuously (ie, they'd only see a demographic effect on payouts if there were a global decline in life expectancy) rather than on a defined batch of customers.