Different scales give different results.He is not paying his designers more than $150K. Wizards is also not paying their designers $150K. Please stop comparing apples to grapefruit.
So you're telling me that a small studio can afford to pay better than a multi-billion dollar entertainment conglomerate that operates the world's largest roleplaying game?
More likely, it's that Hasbro doesn't care about its employees.
The source is Coville's video where he talks about how he pays the designers who work on his projects. I'd have to go through hours of video to find it. But he says that the rate of pay currently at Wizards is the same as when he used to write there. If I come across it, I'll be sure to share it.
MCDM has brought in lots of money via their Kickstarters, has a Patreon that brings in a certain amount, and has a select number of employees with which to distribute that money. So what they have can be focused on more laser-like decisions of where to direct their funds. Hasbro is a huge corporation of course as you say... but is paying out huge amounts of money to places that MCDM does not have to deal with. All the different departments in both toys and games, their marketing departments, their human resources, all the facility management from their offices and factories across the US, multitudes of travel expenses, not to mention their probably huge numbers of legal staff and insurance payments. And that's only the beginning. And that doesn't even include all the facets of the executive offices plus what goes out to shareholders and the like.
So while I agree with you that a corporation like Hasbro could obviously pay employees more money than what they currently do-- I do not disagree with you there-- we can't look at a dozen-employee company like MCDM and think their finances can just scale up on a 1-for-1 basis until they reach Hasbro's size. It's much more exponential rather than linear. Thus I don't think anyone should bother trying to make comparisons between these two different types of companies because the scales just don't align.