For a chance at power. People don't seem to get where the power is. Money is a resource, like land or gold, like trading favours or your commands being followed by your slave workforce. These people are beyond money as the primary means to power, it's just one of many resources for them. Measuring power in money, as we too often do, grossly obfuscates how all this shit works. It isn't as simple as who has more cash. But if you're poor or working class, money is the most significant means to power, the most obvious, and the most sought.