1. Is it normal for teachers to have alternative income for the days they don't work?
2. Sounds like the term "six figures" has a special meaning other than just being in the range 100.000 - 999.999? It appears like there is a connotation that it is a special things to achieve in your life.
3. Taking inflation into account, shouldn't it soon be normal to earn that amount (when including pensions and benefits like health, which I know is expensive).