In the United States, there is no law to make a rigid provision on the proportion of expenditure of charities. Generally speaking, the management fees of ordinary charities should not exceed 35%. However, the lack of hard and fast rules has also caused some charities to seek personal gain under the guise of charity. According to statistics, there are dozens of charities in the United States whose management expenses exceed 70%, and some even exceed 90%. For example, the cancer foundation scandal exposed on 20 15, of every 1 dollar received by this charity called "American Cancer Fund", only 3 cents were really donated to cancer patients.