Any time anyone says that complex societal issues can be solved with simple policy changes, alarm bells go off in my head.
By that I don't mean that simple solutions to complex problems do not exist, rather that getting them approved and implemented is often not so straight forward as some would like to think. Human societal systems are complex and very messy.
Watching the introduction of the embedded video gives me the feeling that the author is perhaps still studying economics and so it does come across quite hubristic to say to have a definitive answer in a early career paper that has yet to go through rigorous peer review.