The Supplemental Nutrition Assistance Program (SNAP), formerly known as the Food Stamp program, provides financial assistance for purchasing food to low- and no-income people living in the U.S. It is a federal aid program, administered by the U.S. Department of Agriculture, though benefits are distributed by individual U.S. states.
http://www.fns.usda.gov/snap/applicant_recipients/eligibility.htm lists eligibility requirements.
Anyone with less than $threshold of assets and income qualifies, with one caveat: if you're an unemployed able-bodied adult (not disabled, child or senior), you must qualify also for "able-bodied adults between 16 and 60 must register for work, accept suitable employment, and take part in an employment and training program to which they are referred by the local office". Basically, if you look to the SS office like you are looking for work with any convincing degree of effort, you pass.
As far as I know, most western countries have an equivalent, frequently with LESS of eligibility requirements (e.g. you don't even need to show effort to find work for "Income Support" in UK - they didn't have Food Stamps per se till ~2012 or so, just cash help).