They already did, 450 years ago.

Source of data: Bob Allen’s home page; indirectly also three Polish books: Ceny w Krakowie w latach 1369–1600, 1601–1795, 1796–1914. The earnings at the end of the period would appear less inflated if expressed in gold: the gold/silver price ratio was approximately 15.5 until 1872, whereas in the early 1900s, it grew to 33–40.