A fixed amount of money circulating in the economy is like a fixed amount of water in your toilet bowl. At a fixed level everything works beautifully.

But government deficit spending, the Fed/Treasury, and bank lending control the amount of water in your toilet bowl.

And when the supply of water is increased your toilet bowl eventually overflows.

Inflation is an excess of water supply, which ends up spilling all over your bathroom floor. And all of the items on your bathroom floor, like rent, food, gas, get raised up off the floor as more and more water spills out of your toilet onto your bathroom floor. That rise in water is a rise in prices.

And at some point your bathroom becomes a swimming pool, with everything drowning in hyperinflation.