Everyone keeps complaining about the prices going up on expansions and stuff. I personally don't mind. That way you have something to do instead of just sitting there staring at your bakery.
You know, a bit of a challenge. Along with the goals, mastering appliances, and earning coins/gems to expand, it keeps you busy. Imagine if you just earned free gems willy-nilly. You'd have nothing worth working for.
I know the prices are a bit outrageous, but hey, you're not bored anymore. Just think of it this way