Posted on August 26, 2015 by Aimee Picchi in CBS Moneywatch CBS Moneywatch, By Aimee Picchi How much money do Americans need to maintain a modest standard of living, where families don’t struggle to put food on the table or pay the rent? In most large U.S. cities, meeting that basic level of economic security requires income that’s far beyond the federal poverty line, which is often used to measure what families need to survive, according to a new study from the left-leaning Economic Policy Institute.