Part of the issue might be that those who choose the more moral course don't get the large government grants and military funding, which means that they don't g

Part of the issue might be that those who choose the more moral course don't get the large government grants and military funding, which means that they don't get well known, not because they aren't just as talented but because of lack of funds. So scientists of standing may self select for the kind of person who will do anything for money and fame. If society had more funding for principled causes, or celebrated those with them, we might see more scientists with standing (i.e. well-known) who also stuck to their principles.