I suspect if this becomes any kind of success it will quickly become the main or sole source of income for a lot of independent authors (as most of them make all their money from Kindle sales anyway — a lot don't offer physical books or have books available on other platforms at all) and so the zero - sum effect will be far more important. (andrewhickey.info)
Social Security was never meant to be your sole source of income in retirement. (cnbc.com)
So if your 401K / taxable IRA is your sole source of income, a good chunk of it pulled out each year is never taxed. (financialsamurai.com)