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.
The answer depends on how much income you report to the IRS. It used to be so simple: Social Security benefits were tax-free. Period. But then, as part of a Save Social Security plan, Congress decided to tax up to 50% of benefits. Later, lawmakers decided to tax up to 85%, with the extra revenue going to shore up Medicare.