I will offer an unbiased opinion of the life insurance:
I work for high net worth individuals, many have multiple, substantial life ins. policies (personal, business and umbrella liability). It IS NOT unusual, for someone with vast earning potential to carry several million dollars of insurance, utilizing several policies.
The purpose of such policies are to cover debt (mortgage, CC, loans), pay for children's upbringing, college, sustain the family in their current and future standard of living, taking into account inflation and cost of living increases.
Most of the insurance companies I have worked with require a physical exam with lab studies. In the case of policies over 2 mil, financial docs are also required to substantiate the necessity. I am implying that TS knew of at least SOME, if not all of the big policies. I do not find this unusual, TS was a smart lady and would want her family well taken care of.
I do not have the capacity to earn anything even close to TS, yet I have a large policy, all beneficiary designations are made to my estate. I have estate docs, which when married, left 55% to my ex and 45% to a "minor's trust" for my child/ren. This protects the kiddos portion from being mixed in with the spouses portion. It is important to do this because, if your widow remarries, their new spouse has access to all the $$$. I also have co-trustees on the minor's trust and both must sign off on any withdrawals, one trustee from each side of the family. I PRAY that TS had her estate set up this way as well.
MS had at least one policy on himself, IIRC for 250k/500k.