Bob dies and the company goes under. A few of his customers can't find alternate suppliers and go under as well. Some products cease to exist; others become more expensive. A huge loss to the market.
We all pay for others' mistakes and misfortunes.
When someone creates hundreds of millions of dollars in pollution and they have far less in the bank or in profits, who pays for the cleanup costs? You will. Your "simple solution" only fixes small cases of mistakes or misfortune, the easily affordable ones.
And while you might be happy living in a society where you watch someone die on the sidewalk because they should "pay for their mistakes or misfortunes" I think the vast majority of us don't want anything to do with that kind of society. We aren't here to serve the economy, it's here to serve us.
It may sound cold but at least you don't have to steal money from all the people who actually create value and you don't have to pay for bureaucracy