Study the table below, which shows development data for three countries.
| Country | GNI per Capita (USD) | Average Life Expectancy (years) | National Happiness Score (out of 10) |
|---|---|---|---|
| Country Alpha | $48,000 | 71 | 5.2 |
| Country Beta | $14,000 | 80 | 7.5 |
| Country Gamma | $4,100 | 64 | 5.9 |
Suggest why Gross National Income (GNI) per capita may not be a reliable indicator of actual social well-being.
