just putting this here - a post by a Nobel laureate in economics, Paul Krugman, asked about the much beloved Tory trick of “trickle down”:
"There is no debate over trickle down . The evidence against supply-side economics has been decisive for decades; even George W. Bush’s chief economist called its proponents “charlatans and cranks.” I don’t know a single economist with an independent reputation (that is, someone who has done respected work outside the political arena) who takes trickle down seriously.
So why does it seem to casual observers that this is still a debate? Because there’s a lot of big money supporting supply-side doctrine. It’s a lot like climate change denial: all the denialists, and all the trickle-down economists, are basically on the payroll of interest groups. Don’t dignify this money-fueled “argument” by pretending that facts or logic matter here".