In a report titled "Working for the Few" released Monday, the global aid and development organization detailed the extent of global economic inequality created by the rapidly increasing wealth of the richest, warning of the major risks it poses to "human progress."
According to the report, 210 people have become billionaires in the past year, joining a select group of 1,426 individuals with a combined net worth of $5.4 trillion.
It added that the wealth of the richest one percent of people in the world now amounts to $110 trillion, or 65 times the total wealth of the bottom half of the world's population.
"This massive concentration of economic resources in the hands of fewer people presents a significant threat to inclusive political and economic systems," the report said.
"Instead of moving forward together, people are increasingly separated by economic and political power, inevitably heightening social tensions and increasing the risk of societal breakdown," it added.
Oxfam said that based on its polls conducted across the world, it is believed that there are many laws and regulations designed to benefit the rich.
"A survey in six countries (Spain, Brazil, India, South Africa, the UK and the U.S.) showed that a majority of people believe that laws are skewed in favor of the rich," the report said.
Oxfam singled out India as an example, where the number of billionaires increased from less than 6 to 61 in the past decade, concentrating approximately $250 billion among a few dozen people in a country of 1.2 billion.
"What is striking is the share of the country's wealth held by this elite minority, which has skyrocketed from 1.8 percent in 2003 to 26 percent in 2008," the report said.
Oxfam said that India's billionaires acquired their wealth in 'rent thick' sectors – industries where profits are dependent on access to scarce resources – "made available exclusively through government permissions and therefore susceptible to corruption by powerful actors, as opposed to creation of wealth."
- By CNBC's Li Anne Wong. Follow her on Twitter @LiAnneCNBC