If you expect you'll pass from this planet with a good deal of assets still remaining in your IRA(s), and the 10 years to distribute all of that to beneficiaries applies, then having many beneficiaries vs. just one could reduce their collective total income taxes on those assets by each having less income from the distributions and likely being in a lower income tax bracket.
Additionally, if you don't leave your IRA's to your spouse, then when one of you dies, the 10 years distribution period starts on that partner's IRA while the other is delayed. This means the distributions are further spread out/lower income taxes. Come to think of it, this is a good reason for legal polygamy.
Additionally, if you don't leave your IRA's to your spouse, then when one of you dies, the 10 years distribution period starts on that partner's IRA while the other is delayed. This means the distributions are further spread out/lower income taxes. Come to think of it, this is a good reason for legal polygamy.