Vague assertions with no evidence don't really help the discussion. If someone is going to assert such a strong claim like "We have more than enough taxes on working people and not enough on the wealthiest classes.", they really need to at least define what they mean by "working people" and "wealthiest classes" and then give some evidence to show that "taxes are disproportionately applied" between these groups. (You say it was a "truthful comment" but how can you even be sure you are interpeting the comment the way the original poster meant?)

(In general, whether people agree or disagree with an assertion I would hope they wouldn't downvote something as long as the person contributes enough to the discussion that the reader can understand what they are asserting and can check for themselves if the evidence they give supports or doesn't support the assertion.)