Lane argues that the Easterlin paradox and the hedonistic treadmill theory that happiness is ultimately useless are not actually true. Lane points out that Easterlin's findings were mostly limited by data from Easterlin's time, and that Lane's investigations take a broader perspective of the relationship between money and happiness. Lane accepts Easterlin's identification that richer people are happier than poorer ones. International surveys continue to reflect this trend even twenty years after Easterlin's study. What Lane finds wrong with Easterlin's conclusions is that overall increases in wealth increase a society's overall SWB. One thing Lane takes into consideration is that beyond a certain point, wealth can no longer buy happiness. It is only for the poor that happiness can be purchased, as the poor do not have sufficient resources to ensure survival, making finances a source of concern and thus an increase in negative affect. But with the rich this concern disappears, since there are enough material resources to ensure survival. Lane says studies have revealed that “While the poor and less educated worry about health, income, and things they cannot easily control, the richer and better educated worry more about their relationships with spouses and children and with more controllable aspects of their lives. Money doesn't reduce worries; simply