No, making money is not the sole purpose or any purpose of mankind. Producing resources is necessary for humans to survice. A market economy is simply the most efficient way to do that. How do I know? Because that's what people voluntarily tend towards when they have the ability to choose. The most efficient people create lots of great things, thus usually making the most money and sharing their ingenuity with the world. Unless, of course, the government intervenes into this beautiful process in an attempt to forcefully "share" the value of the productive with those who are not.