Besides Carnegie's market manipulation, United States trade tariffs were also working in favor of the steel industry. Carnegie spent energy and resources lobbying congress for a continuation of favorable tariffs from which he earned millions of dollars a year. Carnegie tried to keep this information concealed, but legal documents released in 1900, during proceedings with the ex-chairman of Carnegie Steel, Henry Clay Frick, revealed how favorable the tariffs had been. Herbert Spencer absolutely was against government interference in business in the form of regulatory limitation, taxes, and tariffs as well. Spencer saw tariffs as a form of taxation that levied against the majority in service to "the benefit of a small minority of manufacturers and artisans".