But it's not just his. Hypothetically, I left college to work with him at the garage at his business so he could have another mechanic. When he got pretty old, and couldn't do the repairs I did them for him. I gave up any other career path so I could work at my dad's business. When it's gone, I don't have any other options, and I didn't make huge sums of money to make my own business.
So yea. Maybe in excess of 1 million, government takes control of the remainder and you have to buy it, everything under remains untouched. Not a perfect system, but I prefer it to your alternative. But I'm self interested, so there's that too. Let's just have everything in moderation; you can inherit the family home and shop, but nothing with stocks or anything like that?
In any case, it's probably not gonna happen anytime soon