I saw it, and it said that a household of eight living on an income of $200k would be "low income".

First, "low income" is not poor, either legally or in the informal definition of the word. Even according to the chart you're referencing, $200k is far above the poverty line. It's more than twice the cutoff for "extremely low income".

Second, this is also based on an absurd qualifier: It's only "low" if you're trying to support seven dependents.

By this logic, $300k a year is poor too (if you're supporting a household of 12), and a million a year is also poor (if you're supporting a household of 40 in San Francisco).

This is silly. If your monthly income is $16k you aren't poor.

You can still be broke. You can be in debt. But no: you are not poor.