You can think of "grit" as meaning mixed wealth. It's desirable because people are more likely to use their wealth pro-socially, rather than buy a new BMW every

You can think of "grit" as meaning mixed wealth. It's desirable because people are more likely to use their wealth pro-socially, rather than buy a new BMW every other year, if they don't live in an enclave isolated from the economic struggles of the rest of society.