Don't forget the flip side of that, when there are very few mega-corps who provide everything, then everybody [who works] works for them. I've read science fict

Don't forget the flip side of that, when there are very few mega-corps who provide everything, then everybody [who works] works for them. I've read science fiction where this was culturally significant, since you are part of a tribe which has a long and perfect memory. If you got a bad report from your manager one time, then it can affect you in subtle ways for the rest of your life. If your [favoured] co-worker behaves like a dick to you and you react badly and you get dismissed[0], then this can essentially destroy your life since you won't work under that mega-corp again and perhaps the others won't be that keen on taking you on either. This is a future scenario which is a bit extreme but we can see the indications of it already. [0] I have personal experience of this from 20+ years ago, and though I'm long since moved on there are companies I remain unwelcome at though I've never worked there. Years afterwards it could have affected me badly except that the HR at the place which asked for a work-history reference and were told nonsense actually dealt with it in an adult manner and were ok with my explanation.