"Trickle down economics" isn't really a thing anyone has ever advocated, but more importantly, this is the opposite of what unions do.
Unions' entire purpose is to create a guild or a cartel structure that limits competition in a given labor market, in order to raise the income of those who are able to gain access to union jobs. And for the most part, union bosses rake in a massive amount of cash and loot their members while the members themselves get minimal benefits.
They don't "spread the wealth" at all.
They concentrate the wealth in fewer hands, and funnel a lot to the top of their organizations.
Government climbs in bed with Public Unions. The contract negotiations are between the Union and the government and the consumers and taxpayers are left out of the negotiations.
The government and Unions end up in collusion against the taxpayers and consumers in exchange for campaign contributions and political support.
A simple example of this is police reform in California. If you can’t do it there, you can’t do it anywhere.
The legislation was set up and then the police Union walks in.
Police reform? What police reform?