An argumentum ad crumenam argument, also known as an argument to the purse, is the formal fallacy of concluding that a statement is correct because the speaker is rich (or that a statement is incorrect because the speaker is poor).
The opposite is the argumentum ad lazarum.
Usage
If you’re so smart, why aren’t you rich?This new law is a good idea. Most of the people against it are riff-raff who make less than $20,000 a year.Warren Buffett is hosting a seminar. This seminar is better than others, because Warren Buffett is richer than most people.References
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