The resources industry donated $136.8 million over two decades to Australian political parties. Donations buy a lot of influence, with research showing that for every US$1 spent, the return on investment can be as high as US$220. In return, public policy is routinely moulded to suit the highest corporate bidders and their lobbyists. Adam Lucas investigates.

Lobbyland: ten lobbyists for every MP has democracy on life support – Michael West