You are assuming that Arthur, economics advisor to Reagan, neo liberal, greed is good, trickle down economics, Laffer is correct.
He just drew a bell curve on the back of a napkin and told.rich people that it was a good idea for them to be richer and people think he's f***ing Yoda.
Jesus wept.
Apart from the 3 Blair elections, since 1945, Labour have managed a grand total of 1 General Election victory with a majority of more than 5.
I'm pretty much where @hans kraay fan club is on all of this.