I'd say #14, #15, and #21 were pretty "wtf". Inflation is taken into account by the 4% rule and most accepted methods of calculating a safe withdrawal rate. And stocks appreciate with inflation, so inflation should not really be a concern for retirement.
#15, even the most antimustachian people I know, debt slaves who are blinded by the darkness of consumerism and waste, and disease ridden with excusitis and complainy pants syndrome, are aware of how much they spend. Maybe trust-fund babies or CEOs who outsource someone to log in to their bank account and make sure the balance is positive are unaware though.
#21 - ha - working by choice is legitimate, but working past 67 by necessity? I would think most anti-mustachians are not in any condition to work at that age, due to illnesses and other health complications resulting from their excessive commuting by car and other poor lifestyle choices.