I don’t use the term “open source”. I say free software because giving someone else control over your computing is unjust. The proprietor of the program has absolute control over how the program works and you can not change it or use alternative versions of it
The “system” includes many tax breaks for the lower income. I do agree that we could look into taxing billionaires more but that won’t fix the bigger issue.
The government needs to work on balancing its finances
Honestly I would skip Arch and just use something like Fedora or Debian. Arch is way over rated. You can build a Arch like system out of anything.