When silver prices dropped in 1876, producers sought to have their bullion struck at the Mint, only to learn that this was no longer possible. The matter became a major political controversy that lasted the remainder of the century, pitting those who valued the deflationary gold standard against those who believed free coinage of silver to be necessary for economic prosperity. Accusations were made that the passage of the act had been secured through corruption, though there is little evidence of this. The gold standard was explicitly enacted into law in 1900, and was completely abandoned by the U.S. in 1971.