Comment by oarsinsync

Alternatively, companies hire multiple subject domain experts, and pay them handsomely.

The experts believe they've been hired for the value of their opinions, rather than for being 'yes-people', and have differing opinions to each other.

At a certain pay threshold, there are multiple peoples who's motivation is not "how do I maximise my compensation?" and instead is "how do I do the best work I can?" Sometimes this presents as vocal disagreements between experts.