As you may know very well, these two religions share very static philosophies in seeking quiescence and avoiding harsh reality. They place greater emphasis on spirit rather than on material, and favor the Middle Way tolerating the coexistence of the strong and the weak over rational choices and the exclusive pursuit of self-interest.
Accordingly, honest poverty is respected and only those physical possessions required for subsistence recognized as desirable. Moreover, the accumulation of the wealth was considered as immoral. 1/6  Lastly, history and tradition, being deeply rooted in the Asian region, consequently put up considerable resistance to change.