Why was this period sometime called the glided age?

The period known as the Gilded Age, roughly from the 1870s to the 1900s in the United States, was characterized by rapid economic growth, industrialization, and the expansion of railroads, which contributed to significant wealth accumulation among a small elite. However, beneath this veneer of prosperity lay widespread social issues, including poverty, labor exploitation, and political corruption. The term "gilded" implies that while the surface appeared shiny and prosperous, deeper issues of inequality and injustice marred the era. This contrast between wealth and social problems is what defined the Gilded Age.