Hm. I guess if you read it as a euphemism for getting a better job offer elsewhere, winning a medium-sized lottery prize is more accurate: you can, in theory, contact a former employee, buy them drinks in exchange for getting their advice on a thorny problem, counteroffer them either now or in a year, etc. (And with a larger prize it's not impossible they'll use the winnings to start their own company or maybe even split the winnings with a coworker they're friends with.

Winning a lottery prize large enough to never talk to anyone again, and getting hit by a vehicle, are both very low-probability events. Employees (especially good employees, and perhaps in groups) leaving is a much more pressing risk.