comment on post: During retirement, a person's financial needs may vary due to changes in their lifestyle, expenses, and income. At first, they may require a higher wage replacement percentage or purchasing power amount to cover discretionary expenses such as travel and hobbies. As they age, their expenses may decrease, and healthcare costs may increase, necessitating a lower wage replacement percentage. A person's income may fluctuate throughout their retirement due to factors such as pension payouts, Social Security benefits, and investment income. Therefore, the same wage replacement percentage or purchasing power amount may not be necessary or feasible throughout an individual's entire retirement period, and financial planning should account for these potential fluctuations