Wesley and a paradox

John Wesley enunciating the inherent paradox of Christianity (and of Judaism as well, I suspect). Note that by 'religion' Wesley means Christianity, not religion in general, necessarily.

I fear, whenever riches have increased, the essence of religion has decreased in the same proportion. Therefore I do not see how it is possible, in the nature of things, for any revivial of religion to continue long. For religion must necessarily produce both industry and frugality, and these cannot but produce riches. But as riches increase, so will pride, anger and love of the world in all its branches.

Quoted in Philip Yancey's 'What Good is God?' - pg 177