I am a semi retired school teacher
I hope that you had a satisfying career. I understand teaching is no picnic in this day and age.
it is not, and by being semi retired, I just fill in like the substitute, which is almost worse at least I have reduced my work hours
Yes, but the children respect you less and expect that you will just play a movie instead of teaching them anything.  Now i feel sorry for you.
well retirement is coming, speaking of that retirement is a recent thing only introduced in the late 19th century early 20th century
Probably due to the labor union movement and sweatshops of 1910-1920.  We may see a new wave of labor union activity given the new gig economy and harsh treatment of contract and employed labor.  Your opinion?
That is very possible, there are many aspects of that Germany was the 1st country to have a retirement that was in 1889