All of the following powers were exercised by the roman senate during the Republic except "<span>a. appointing dictators," since dictators almost always rose through force. </span>
Corruption. Gilded means covered in gold, but on the inside, it was corrupted. There was economic growth, but there were political machines (industry had too much power) and lots of poverty, which lead to the rise of labor unions. For more information, check out the Wikipedia page on the Gilded Age.
The name of the case was Plessy vs. Ferguson. Hope this helps :)