True! Money is power as knowledge is power as many things are or can be power. And with all of them they are raw power. Power for good and power for evil. Without empathy and compasion to direct raw power, distruction and corrosion are just as easily achieved as productive ends.
Money isn't power, money gives power. It allows you to influence people, and influence over people's actions is the definition of power. There are other things, though, like religion, personality, skills. So money and power aren't identical, but money certainly is one aspect of power in today's society.