The existing metrics are already the fairest. i.e. Life expectancy, work length, income, spending, etc. Metrics has to be objectively measurable, otherwise th

The existing metrics are already the fairest. i.e. Life expectancy, work length, income, spending, etc. Metrics has to be objectively measurable, otherwise they would have a huge subjective bias. Some people can be happy and enjoy life in almost any circumstances - but that is much harder to measure across societies and you'll end up with scams like "happiest country on Earth".