I think the real problem is that it's impossible to work as a believer/grinder in any large organisation (e.g. filled with grifters). It's not sustainable to work as a grinder for a long time in the first place, but it's especially terrible when it's unrewarding.
Being a grinder/grifter makes sense. That's how you climb the corporate ladder.
Being a coaster/believer also makes sense, you are essentially trading status for a job you enjoy doing. They are not suckers, they will accept to do more work for less but only if you give them the job they want, otherwise, they won't do it.
Grinder/believers are probably the most likely to be exploited, but it doesn't mean they are suckers either. These are the kind of people who have standards, break their standards and you will find yourself with a surprise letter of resignation. If they are an essential element, as they often are, they will be more than happy to see you struggle as they are now working for a company they deem more worthy, they may take a few fellow believers with them too.