Banks, and other companies, can indeed have shareholder votes to make decisions. You can't vote with dollars directly but you can buy more shares. So shares ar

Banks, and other companies, can indeed have shareholder votes to make decisions. You can't vote with dollars directly but you can buy more shares. So shares are similar to governance tokens in DeFi projects. And in the real world, people also borrow money to get more than 50% of the shares. This is called a leveraged buyout. However, the difference to DeFi is that shareholders have certain rights (like the right to share in the profits and assets) that are protected by laws. That means a majority shareholder cannot take actions that amount to stealing the company's profits or assets from other shareholders, or they'll be sued. They may do things that the other shareholders don't like, like dismantling the company by selling of parts for cash, but they'll have to fairly share the proceeds.