Earlier quoted context omitted.
The current narrative is more along the lines of, "How much work should your fiancee spend on declaring his commitment to you?" The societal answer is at least two months. Salary is the convenient measure for this. The ring is the communication medium.
>The societal answer is at least two months. Might be an American thing? My parents spent about 1 month worth of my dad's salary on two wedding rings a long time ago. My dad actually wanted to buy a far more expensive ring for my mom, but she insisted to keep it simple and "cheap" and "unproblematic" to wear. Same story in the rest of the family. Friends (usually a lot younger than my parents) spend even less on ring…
https://www.bbc.com/news/magazine-27371208
>These two achievements - making the diamond ring an essential part of getting married and dictating how much a man should pay - make it one of the most successful bits of marketing ever undertaken, says Dr TC Melewar, professor of marketing and strategy at Middlesex University.
>"They invented a tradition which captured some latent desire to mark this celebration of love," he says. Once the tradition had been created, they could put a price on it - such as a month or two's salary. And men, says Melewar, would pay whatever was expected because it was a "highly emotive" purchase.
Of course, it's all optional, jewelery purchases are not a mandatory part of getting married, I (heterosexual woman) have been married for a decade and neither of us purchased any sort of jewelery.