"Material prosperity" refers to having a good amount of wealth, possessions, and financial stability. It means being able to afford and enjoy basic needs, comforts, and luxuries in life. Full definition
I see no sympathy toward the instinct of generosity nor any real appreciation of the genuine blessing of material prosperity. (firstthings.com)
The first is the belief that a continuous growth in material prosperity is the natural order of the human universe. (dotearth.blogs.nytimes.com)
This structural process is producing large amounts of material prosperity, but it is undermining the middle class in the process through the destruction of jobs. (blog.politics.ox.ac.uk)