Examples of Unethical Research. Whichever ethical requirement may be chosen, the history of human research offers grim examples of its violation. During World War II, German researchers performed a large number of experiments in concentration camps and elsewhere.
First, lower income earners pay no federal income taxes on Social Security benefits, so taxation is not an issue for them. However, once a relatively low threshold level of taxable income is surpassed, somewhere between 50 to 85 percent of benefits are subject to taxation.
Under current law, the highest percentage of Social Security benefits that any family pays as income tax is 33.7 percent. That figure represents the product of the maximum proportion of benefit income that is taxable (85 percent) and the highest marginal income tax rate (39.6 percent).