> making the general population poorer by reducing their buying power

Exactly. Also known as a tax. You can make someone poorer by taking their money and destroying it, or you can make someone poorer by letting them keep their money and devalue it by creating more. Same coin no matter which side you want to look at it. There is no such thing as a free lunch. The taxes are always going to get paid in the end. The only choice is in exactly how you want to pay it. Each method has its own set of tradeoffs, so, like with everything, different groups understandably believe in different methods. In practice, both methods will be used. Nobody, apart from the previous commenter, is ever completely hardline "money must only be destroyed" or "money must only be created", but groups will still debate over what is the optimal ratio.