Don't worry: I'm not aiming to create misunderstandings. In this context, the verb to purchase wants to mean to pay for the bureaucratic and expensive paperwork involving a request of marriage. Not to purchase the love of the spouse we'd like to have (this is impossible, as money can't buy love). Imagine your beloved boyfriend or girlfriend lives in a country far from yours. The City Hall, depending on the country where you live, could ask for additional paperwork, as a statement or clearance from the Embassy. And it costs a travel to get to the Embassy and the statement fee. Sometimes, the Embassy lasts several months to prepare the statement, so your boyfriend or girlfriend must return to his/her country before his/her VISA expires (or he/she'll become an illegal migrant). To return to your country at the proper time to marry you. And it costs money. Also remembering your boyfriend or girlfriend can't legally work in your country until getting the regular residence after marriage. Moral of the story: if both of you are poor, your marriage dream can become quite an ordeal, if you are dating a foreigner. Moral of the story: I can't stand the philosophy claiming that money can't make us happy. It really sounds too politically correct. It should be said: money isn't the one and only existing medium to reach happiness. Such a statement sounds more consistent and correct. The truth is, we should love God above money, meanwhile remembering people can't live as penniless until staying in this sinful world.