Caught up on the theme. It makes me think of the ACE (adverse childhood event) survey. It´s a checklist of stressors and depending on how many one checks off, it gives an indication of how likely emotional/mental health is affected. Even with that information, it is not a black and white diagnosis scenario because we all come with different levels of resilience, grit and coping strategies. Luckily there are now teachable strategies for increasing resilience- resilience training. Seems that you don´t know you need that until life throws you a curve ball that smacks you in the head.
In regards to the money, I would think that if a 1%er lost 90% of their money, the change in lifestyle would be similarly devastating to as to someone who lives pay check to pay check. It´s more that it is what we are adjusted to and what our expectations are than the actual wealth percentile- assuming that basic food and shelter needs are met. (I look at the situation of the refugees with nothing housed in substandard housing and see that I have it good from many angles.)
But... grief is grief, pain is pain and each person has a different ability in regards to being able to absorb and adapt to new crappy situations. That for me is why it´s not worth comparing. If you don´t know someone´s life trajectory and all of the mini and mega traumas they´ve experienced along the way, then you have no idea if what they are dealing with now is the "last straw" or no biggie. In the end, we´ve all experienced betrayal and the breaking of what was supposed to be a lifelong trust with thee one who had our backs. The consequences of broken trust reverberate for a long, long time.