Considering if the lump sum is not risked and is left uninvested, the corporation is betting that I'll die in 16.7 years and if I take the lump sum, I agree with them. I think I will live past the 16.7 years. That's the way I see it.
True, that is the left edge of the chart in
this post.
One could also put the lump sum in ~risk-free CDs and/or Treasuries and get ~3%, pushing the breakeven lifespan to ~23-24 years, etc.