That's not what "land of opportunity" means in the US. It means upward social mobility, plentiful job opportunities across a wide range of inudstries, decent work for decent pay, ample rewards for hard work.

Socioeconomically, the post-WW2 era is widely considered America's peak. The strong economic growth was broadly shared and created the largest and most prosperous middle class in modern history.

During this time, a single breadwinner could buy a car, a house and support a family. This is the "land of opportunity" and "American Dream" people talk about today and politicians have been promising the return of for decades.

The vast majority of Americans aren't calling for a new Gilded Age, although that's sort of what they're getting now, which is a big reason so many Americans are dejected and angry.