I'm a financial planner and I've told a retired engineer (early 60s) that with his 800k nest egg he would never have to worry about money again and I've told a doctor (early 60s) that his 3.3 million wouldn't last 20 years and more likely closer to only 15. How can this be when the Dr has 4 times as much money and he came into the meeting thinking he was set for life??? The Dr 'needs' 240k/year to live off of (which means withdrawals of 300k-350k from a retirement account) while the engineer needs 60k.
I had a morning meeting with a client (late 60s) who fell out of his chair when we told him that in a couple of years when he is forced to start withdrawing from his IRA that his yearly income would be 100k. That afternoon a different client (early 70s) was very concerned that he didn't have enough money to live on and that he might need to increase his withdrawals from his investment portfolio. His annual income that wasn't enough to live on? $1,000,000
So in speaking about financial independence, I offer a quote from Dante's Paradise Lost "The mind in and of itself is it's own place, and in that place it can create a heaven from hell, or a hell from heaven."