I've got to disagree. not every contributor is making the code base better. I'm in a situation where we are such a small team that there really is no gatekeeper, and we only require one approve per pr...and I've come back from vacation to some monstrosities that I have to look at with no time to fix.
After a pairing session with a a fellow developer, where I took the extra effort to refactor something along the way, probably an addition 15 minutes of effort...she quipped- no wonder it takes you so long to finish your stories sometimes.
I mean, that's not why- I'm ADHD, so my lack of productivity sometimes is invariably due to a day where I forgot my meds or didn't get a full nights rest.