In misc.survivalism Spehro Pefhany wrote:

Where does money come from, and why does it generally buy less every
year?

1. It is created and destroyed by various means. Major influences
include open market operations, the discount rate and bank reserve
requirements.

2. Because monetary growth has generally been faster than the growth in
goods and services.

But I suspect you already knew this.

--
In the councils of government, we must guard against the
acquisition of unwarranted influence, whether sought or unsought,
by the military-industrial complex. The potential for the
disastrous rise of misplaced power exists and will persist.
-- Dwight David Eisenhower