Bean Bag Mystery

You buy a bean bag and fill when you buy it. 3-4 months later its looking a little sad so you top it up. Months pass and you buy more beans. And so the vicuous cycle continues.

Will my bean bag ever fill to a point where it never needs to be filled? I mean I understand that the beans get squashed but after a while (6 years) shouldnt the beans that are squashed fill the actual space inside the bag?? Or do the bean manufacturers have a sinister plot to make people buy their beans forever.

And if the beans do hit a critical mass that they never need to be filled can't I just buy pre-crushed beans in the first place and pay that extra cost, knowing I will never have to sit on the bus form the supermarket with a giant bag of beans under my arm?

Also what is the record for the worlds biggest beanbag? I mean theres a Guiness Record I think any seamstress could tackle. Forget beard of bee's thats too dangerous.