Hi
WIP
Well, that's always been the way it is with the things of God. God created Adam and Eve and began a relationship with them that was fairly quickly destroyed, although we don't know exactly how long it was, it was most certainly less than 130 years of the earth's existence. Then He brought on the flood and started all over with Noah's family, and it wasn't but a few hundred years, at the most, before men lost the relationship with God that Noah had had. Then God gathered His people together and made himself known to His people in Egypt and carried them out by performing great miracles. It was only a matter of, at most, a couple of years, and they had built a golden calf.
Man has always, always, always been prone to deny who God is. So, to your complaint that this attitude of giving didn't last very long, I would absolutely agree. However, that isn't any kind of proof that it wasn't what God expected of them. When I read Paul's account of these things he does seem to be speaking in a pretty positive attitude about it.
God bless,
Ted