That's because most people don't make adjustments for inflation, because the number is so small. (effectivecoverage.com)
The «4 % rule» suggests that you make annual withdrawals from your retirement savings equal to 4 % of the total when you retire, with annual adjustments for inflation. (cfs4me.com)
He then mentions the famous 4 % annual withdrawal rule, although he notes that for a long retirement this might be revised down to 3 %, with adjustments for inflation. (moneysense.ca)