In addition, most retirement savings vehicles require that participants take a minimum distribution by a certain age. (investopedia.com)
At age 70 1/2, you're required to begin taking minimum distributions from your account, based on your life expectancy. (traditionalira.com)
So again, no taxable events mean no taxes to pay, thus there's no need for the wrapper (and their restrictions - like not being to withdraw money until age 60, having to take minimum distributions at age 71, students not being able to spend 529 money on computers, etc.). (toolsformoney.com)