When is someone going to make a startup that just tailors women's pants to increase pocket size? You'd get so much PR buzz for free.

EDIT:

One way to do this is as a reshipper - customer buys a new item, you order item to factory, alter pockets, then ship the product to end customer.

"butWithBiggerPockets.com"

Sizing issues could be a challenge though - if you alter an item, it can't be returned.