How does one measure happiness? You can't measure it. Most people ask questions like "are you happy? Rate on a scale from 1-10". That's not a measure of happiness. In a Brave New World, the people would have said they were a 10 when it came to happiness because they didn't know any better. If you're propagandized to believe you are happy then you might believe you are even if you aren't. What is "normal"? What is clown world? If you think clown world is normal and someone asked you what normal is you'd answer clown world but is clown world actually normal? We haven't even touched on cultural differences. In some cultures being happy is not seen as a good thing the same way American culture is because if you're happy it means you're too comfortable and not displaying enough humility etc... Culture can impact how people answer.

Any measure of happiness is flawed.

And your measure is well-being which uses worthless measures more often than not like linking post-secondary education to well-being or literacy. Someone can be illiterate and still better off than someone who is literate, same for being educated or not. Also, material possessions and GDP/income, etc... doesn't necessarily translate over to "well-being".

All these measures at the end of the day are usually entirely flawed.