What is the "abundance agenda" and how does it relate to supply-side liberalism?

Housing:

The Abundant answer to this crisis is to create “abundant” housing, of all types, where it is most needed, thereby alleviating the Housing Crisis, which to Abundant Liberals is a crisis of artificial scarcity due to government policy.

Zoning laws that make it hard to build housing (strangling supply)

What did Starbucks and Dunkin' Donuts do wrong in Sweden?

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It’s a still nascent system created and advocated for by “Card-carrying Liberals”*** in America.

Abundant Liberals reject the idea that capitalism itself is to blame for the Housing Crisis, or most other economic crises we are seeing today, instead arguing that bad policy is the root cause.

Paris Erupts in Celebrations, Riots After PSG Wins Champions League - WSJ

Abundance Agenda and “Supply-Side Liberalism/Progressivism” are the same thing, but the former sounds way cooler.

The battle where this is being put to the test now in in Housing.

cheap loans and grants that are given to buy said scarce housing (subsidizing demand)

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Abundant Liberals want to create mass abundance in all spheres. Energy, education, housing, food, transit, etc etc etc. They tend to be deeply urbanist and aim to have “tall cities” if you’re familiar with the term in strategy games. Lots of apartments, lots of transit and walkability, and so on.

I consider myself a Liberal of this school.

In a nutshell the idea is that for too long, American governments (state/local/federal) have enacted regulations that have, inadvertently or not, driven up the prices of key goods and services by strangling supply and subsidizing demand. Abundance Liberals are against this combination. Namely, they want to stop strangling supply and allow for the markets — aided by the state where effective**** — to build mass amounts (abundance) of the goods and services we want and need, driving down prices.

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****Abundance Liberals are not Libertarians, they are willing to make use of government support in the economy

This pretty much shows abundant goals

If Sharks Don't Have Lungs Then What Are Their Nostrils Doing? - IFLScience

Abundant Liberal meme on this topic

Housing Crisis (homes too expensive)

Another liberal meme

Where the Stock Market Stands Now After a Wild Start to the Year - Bloomberg.com

***I use the term “Card-carrying Liberal” to denote self-described Liberals who are active in expressly Liberal spaces, fighting for expressly Liberal goals, rather than as a catch-all term for “Democrat”