> I mean, part of this is just math. If a government spends more, it’s literally injecting money into the economy, so of course you get more jobs and growth in the short term.

Thats not necessarily true. During Bill Clinton's presidency he cut the deficits and the debt and yet the economy saw very strong job growth.

https://www.factcheck.org/2008/02/the-budget-and-deficit-und...

https://en.wikipedia.org/wiki/Jobs_created_during_U.S._presi...