Not only is it 'not perfect'... it is completely useless with regards to what we are discussing. Period.
OK. I'd love for you to give me something that suggests that your assertion that people earning $60,000 care more about the market than high-income folks. I just don't buy it.
The top 10% own 80% of all stock, either directly or indirectly. The idea that people earning $60,000 per year care more about the market than the people that own 80% of all stock isn't remotely plausible.