> Those on £150k+ are in the 98th percentile.

This metric is no longer meaningful, as in 99th percentile you'll have someone making £1.5m+, which is a world's difference.

> You can have a high income and choose to live beyond your means preventing you from accumulating wealth.

What I described wasn't living beyond one's means. It would be that if a person started engaging in taking loans and credit cards and buying things they can't really afford etc. Simple living adequate to earnings, at a £150k, won't make you rich.