The reason why both contents are used is that in these pages it is written about how happiness is actually obtained. Not because of money but because of social needs and maybe a little physiological needs. Happiness cannot be bought with money, as people obtain it mainly by recognizing their social needs. Social needs depend on self-esteem, love, friendship, anything that involves interactions with others, while physiological needs concern biological needs. Money might be encouraged to be spent on things people want, but don't need, or both, and some people would consider that their own "happiness", but that can't really be the case.