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.
(..) - He couldn't have. - Of course he could. But l was with him the whole time. Perhaps he did it while you were putting your clothes back on, dear. Rose, they put it in my pocket. Shut up. lt isn't even your pocket. Property of AL Ryerson. - That was reported stolen. (..)1997 Titanic
(..) - Jack... Let me try and get this out. You're ama... l'm not an idiot. l know how the world works. l've got ten bucks in my pocket and l have nothing to offer you. l understand. But l'm too involved now. You jump, l jump, remember ? l can't turn away without knowing (..)1997 Titanic