Libertarian billionaire Koch brothers throw their wealth at state level politics, climate change denial, union busting and deregulation, all of which makes them richer while they still lay off thousands of workers. Al Jazeera’s People and Power exposes the Koch backing of the Americans for Prosperity political organization and ALEC, the American Legislative Exchange Council.

Charles and David Koch are each worth about $25bn, which makes them the fourth richest Americans. When you combine their fortunes, they are the third wealthiest people in the world. Radical libertarians who use their money to oppose government and virtually all regulation as interference with the free market, the Kochs are in a class of their own as players on the American political stage. Their web of influence in the US stretches from state capitals to the halls of congress in Washington DC.

The Koch brothers fueled the conservative Tea Party movement that vigorously opposes Barack Obama, the US president. They fund efforts to derail action on global warming, and support politicians who object to raising taxes on corporations or the wealthy to help fix America’s fiscal problems. According to New Yorker writer Jane Mayer, who wrote a groundbreaking exposé of the Kochs in 2010, they have built a top to bottom operation to shape public policy that has been “incredibly effective. They are so rich that their pockets are almost bottomless, and they can keep pouring money into this whole process”.

Koch industries, the second largest privately-held company in the US, is an oil refining, chemical, paper products and financial services company with revenues of a $100bn a year. Virtually every American household has some Koch product – from paper towels and lumber, to Stainmaster carpet and Lycra in sports clothes, to gasoline for cars. The Koch’s political philosophy of rolling back environmental and financial regulations is also beneficial to their business interests.