They have a tendency of executing people for white collar crimes. In the US executions are never for the political classes or the rich, they look after their own.
I remember one case in China where a woman basically scammed people out of millions of dollars, so they executed her.
it's mostly because we only execute people for murder, and usually only really really bad ones, premeditated, when done in the commission of another crime, multiple (either spree or serial) or for killing cops.
It has less to do with economic or political might and more to do with poor people just tend to murder more than rich ones. Correlation if not causation.