A bailout could be done for mere profit, as when a predatory investor resurrects a floundering company by buying its shares at fire-sale prices; for social improvement, as when, hypothetically speaking, a wealthy philanthropist reinvents an unprofitable fast food company into a non-profit food distribution network; or the bailout of a company might be seen as a necessity in order to prevent greater, socioeconomic failures: For example, the US government assumes transportation to be the backbone of America's general economic fluency, which maintains the nation's geopolitical power. As such, it is the policy of the US government to protect the biggest American companies responsible for transportation (airliners, petrol companies, etc.) from failure through subsidies and low-interest loans. These companies, among others, are deemed "too big to fail".