Ahem... that's only true if you go by the book with treasures.Jester of the FoS wrote: I've found the cost really pushes people away from rituals, especially since you get exactly enough cash for a magic item. If you buy rituals and cast them you're sacrificing a magic item.
Giving a bit extra helps. +15-20% money isn't really a problem. It's not enough money to buy an item of your level after all. Perhaps a useful trinket but nothing dramatic.
It's really not a big deal. Even if the characters try to add up all their extra cash and buy something, by 7th level they will be able to pool their resources together and buy ... a singe level 7 item. It's really, really not a balance breaker.
That's especially true if you add some of this extra cash as... ritual components. Instead of a total monetary treasure of 2000 gold at 5th level, give 2200 gold and 200 gp as ritual components.
I.e the mage guild of the town doesn't give straing cash and items for the heart of monster X. It gives an item, some gold and some alchemical regents.