Final answer:
Disability benefits are commonly extended until retirement age, with Social Security including retirement and disability payouts. Changes in legislation have increased the full retirement age from 65 to 67 for individuals born after 1959.
Step-by-step explanation:
The most common length of time for disability benefits is until retirement age. Social Security provides various benefits including retirement benefits, disability payouts, and Supplemental Security Income. Originally, full retirement age was set at 65, but legislations have raised it to 67 for those born after 1959.
Disability benefits are given to those who are unable to work due to injury or incapacitation, with the prerequisite that the condition must last at least twelve months for qualification. Life expectancy plays a role in these benefits, particularly for retirement age, as people are generally expected to live longer now than when Social Security was first established.