Earlier quoted context omitted.
> Anyone making over $60k per year could [...] save 20% of their income without dropping below the median household income of $50k. 20% of 60k is 12k, 60k - 12k = 48k. So no, the claim isn't true for the most trivial of reasons.
Nitpicking, 48k is close enough for the point to still be valid. You are technically correct though.
Mathematics is the one discipline where "close enough" isn't close enough. :)