RichardJMurphy, 
The dividing line between those with just enough income and those who have sufficient to fund the increase in their wealth https://www.taxresearch.org.uk/Blog/2024/04/17/the-dividing-line-between-those-with-just-enough-income-and-those-who-have-sufficient-to-fund-the-increase-in-their-wealth/. Being able to threaten that you will give up income because of a potential tax increase is a certain sign that a person has an income in excess of that they need.
