Unfortunately one has to pay a subscription to read the article.

Biden probably has a team of writers who create his works. The quote you cited is one of belief.

“I ran for president because I was tired of the so-called trickle-down economy.”

It is likely that Biden is against "trickle down economy." The problem is that he does not understand that the Democratic Party and the centralized government is a primary component of this trickle down system.