Quite believable. They are probably paid very well, plus there is no bigger incentive to get everything right than the possibility of being arrested or erased if you don't.
I started a coffee cup collection for all the schools my kids went to, until one went to Europe where the schools don't sell swag. I still want an Auburn cup, but those are tres expensive.
A cemetery near me has a row of eight little tombstones from the 1860s, all from the same family, all six years old or younger. They didn't all die in the same year, so that's years and years of sorrow represented.