We're looking for investors with 'pockets' that are deep enough to pay for the project. [=investors with enough money to pay for the project]
People 'vote their pocketbooks'. [=people vote according to how a candidate or issue will affect their financial situation]
It turned out that they had 'pocketed' [='stolen'] most of the money that was supposed to go to victims of the fire.
(..) RenaIdi bIood reIative or we ruIe. No, ma'am. Then it's time. Catch a falling star And put it in your pocket Never let it fade away You wouIdn't happen to be running away, wouId you? What? Dressed Iike this? No. I'm going to a baII. (..)2001 The Princess Diaries