#inflation is the cause of money creation.

Money is created by creating debt. (Any loan or debt someone can take out is basically new money)

When new money is created (debt), more amount of money competes with the same amount of products, therefore, one product will cost more. (Inflation)

This means the value of new money is subtracted from the money already in circulation, because the total market value (sum of all products) do not change, but more money will compete to buy them.

In this sense, when you print money, you create a tax on those, who holds from that money and you give yourself free money without work.

In such a system money can be earned by hard work, or by printing, therefore it creates an unfair situation which motivates you to get from the free money because it is easier then to work hard.