That's absurd. I've worked in call centers, as a mover, and as a software engineer. There are perfectly valid reasons to complain across the spectrum. Worker rights are not some limited good that only need to go to the most vulnerable, and even white collar workers should be aware and proactive about fighting for better treatment in the workplace. Being well paid has not prevented me from seeing egregious workplace interactions across many of my past jobs, or observing that workers could likely get a more generous slice of the tradeoffs we give our employers without in any way being inequitable.