This website suggests $656 as a more realistic figure. Enough to survive on while working furiously on your writing.
http://www.usinflationcalculator.com/
Not sure if that calls into question your statement, or suggests that the CPI is drastically understating inflation.
This also somewhat calls into question what's required for genius to foster. Seems that some people are simply driven to create, and any environment in which they're free to focus on their creative efforts, and have financial concerns taken off the table (I've seen similar arguments made for tech hires: pay me enough money to not have to worry about it) is sufficient.
There's also Daniel Pink's work in Drive.