Economics: There are surprisingly little people studying very large, grand, topics such an inequality. You've probably heard of the handful of economists that do. It's unfashionable due to the influence of the Chicago school and it's focus on free market principles, as well as many other factors.
Physics: Good luck getting any interest or funding if you are not studying the currently dominant theory in your
field (even if there has been no progress in decades).
Economics: There are surprisingly little people studying very large, grand, topics such an inequality. You've probably heard of the handful of economists that do. It's unfashionable due to the influence of the Chicago school and it's focus on free market principles, as well as many other factors.
Physics: Good luck getting any interest or funding if you are not studying the currently dominant theory in your field (even if there has been no progress in decades).