As a HCE option there is The STAR Plan (Strategic Talent Appreciation and Recognition) - an individual after-tax institiutional life insurance (ILI) funded investment and risk management program - same ILI products large employers invest through for NQDC (COLI) but made available for personal ownership.
By 2002 the ILI products funding NQDC had financially evolved into a higher HCE value than a NQDC plan. So in 2002 we moved the ILI plan sponsor role from the employer to our ILI TPA firm - why STAR is available to all HCE's. Employer is merely assisting in HCE awareness of their qualification to join our program and validating role and compensation for ILI underwriting qualification. Hence, a pat-on-the-back and baton pass. No employer costs, liabilities, regulatory or HR issues. The HCE chooses the issuer, contribution capacity, asset allocation, etc, etc. And if the employer wants to make contributions (match, incentive, etc) they can via Bonus 162 with an optional REBA (Restricted Employee Bonus Arrangement) to provide a vesting schedule on the bonus.
STAR serves as (1) a savings complement to the tax-qualified plan / alternative to taxable fund investing and (2) for those in a NQDC plan a distribution management container for life-after-career.