I don't know how you simplify things so much... Do you want 94% tax on stocks? Why stop at stocks? How about property? Your house's net worth?
The social equality shouldn't be based on how much poorer we are in comparison to Musk, but can the poorest of us afford food, shelter, education and healthcare?
Can they afford it by having a decent work/life balance?
Our economic system creates billionaires as a side effect, but is there any other out there that is better and doesn't create billionaires?
At the end of the day, is our average citizen today better off than when they were in 1944?
If you want people to listen that are the questions you should ask and how you should market "socialism". Not "eat the rich" bullshit.