Too much for what? Wealth doesn't buy much in this game, that's why they give you so much of it. What exactly are you afraid your players will do with 10-250k?
When players pay for wealth, they get wealth. That includes multiple homes and apartments around the globe and transportation if your rating is high enough. You spent tons of stones on something that often just makes the game go faster, you should get to feel good about it.
GM: "How are you guys going to get into the club?"
Wealthy Player: "I own the place"
Problem solved, time saved, back to the action!
GM: Well you're in New York but the Mission is in Zimbabwe, Rogue and Quicksilver can just fly and run there respectively, and Rogue can carry two of you, but that leaves 2 still.
Wealthy Player: I have a private jet preparing to take off now. If we leave in a hurry we can get coffees.
Party Ninja: "Oh crap the Ninja action cost me so many stones I had to take Wealth -1 to afford my +Trite Katana! How will I afford all my black pajamas and pointless Shu-Ri-Ken?!?"
Wealthy Player: "I know a guy you can pay in Pocky, I also own the company that makes Pocky, don't worry about it."
Every party should have a Sugar Daddy or Sugar Mama.