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.
(..) and was afraid she'd be an old maid and.... Oh, I'm sorry to be the one to tell you. Oh, it's colder. I left my muff at home. Would you mind if I put my hand in your pocket? But, Melanie, you don't realize what she's done. She's gone and married my Mr. Kennedy. He's my beau, (..)1939 Gone with the Wind