I'm not sure why you've been downvoted. This is generally true, and it's a point made several times in the article -- if policies aimed at taking money from the rich end up damaging the economy, the poor will suffer more than the rich once it all shakes out.

I'm sure the downvotes are due to this thread being a rephrasing of supply-side economics (aka Reaganomics), which has (shown to be|considered to be) (unworkable|undesirable) or otherwise fallen out of favor (at the very least as a political platform).