Because it absolutely has been used by politicians and pundits since the 1980s into the present day and you’re the one spreading falsehoods.
Try and find some examples
Such a neat trick!
We are not talking about which phrase the Right uses today. The idea of trickle-down is what our current taxes are based on. There's no need to call it anything; obstructionism suffices
https://www.heartland.org/publications-resources/publication...
(I am assuming this is a right biased publication, again not well read, genuinely curious because it seems to line up with those middle class I know who were Trump supporters -- they regularly cite their lower taxes).