In his book Happy People, author Jonathan Freedman notes: “Once some minimal income is attained, the amount of money you have matters little in terms of bringing happiness.
Dalam bukunya Happy People, penulis Jonathan Freedman berkomentar, ” Setelah suatu pendapatan minimal diperoleh, jumlah uang yang Anda miliki tidak banyak artinya dalam mendatangkan kebahagiaan.