It was not imposed to save money!

"The three evangelical counsels or counsels of perfection in Christianity are chastity, poverty (or perfect charity), and obedience.[1]"

"A young man in the Gospel asked what he should do to obtain eternal life, and Jesus told him to "keep the commandments", but when the young man pressed further, Christ told him: "If thou wilt be perfect, go sell what thou hast, and give to the poor". (It is from this passage that the term "counsel of perfection" comes.)

https://en.wikipedia.org/wiki/Evangelical_counsels