Wages Have Decreased by 92% Over The Last 130 Years Since the Gilded Age:
You are looking at the evidence right in front of you.
Admittedly the 92% figured is for the shit-hole known as LA.
If you use the US average, wages have only decreased by the following:
$72,000 after tax = roughly $126,000 / year before tax.
(1 – 30 / 126) = a decrease of 76%