You are ignoring political risk eg in 15 years that state government changes the rules and sequesters the money - this actually happened in the UK to the SERP pension I lost mine for a small uplift in the state pension when they changed the rules.
You also ignoring the time value of money 100 million to day is worth more than 10 million for 10 years
You also ignoring the time value of money 100 million to day is worth more than 10 million for 10 years