Somewhere, on a blog that I can't remember now, there was a question on the efficacy of savings over very long periods of time; should life extension protocols actually be found that work.
Someone used a quote from the
The Notebooks of Lazarus Long:
$100 placed at 7 percent interest compounded quarterly for 200 years will increase to more that $100,000,000 - by which time it will be worth nothing.Actually, someone has already tried this: Benjamin Franklin.
So, why would Heinlein have Lazarus, an immortal, say such a thing?
Well, it's clear from the books that Woodrow Wilson Smith, aka Lazarus Long, was a bit of a rogue. One can imagine him on some distant frontier planet, trying to coerce some earnest young and upright rube into joining a card game. It's payday and the boy's flush - but on his way to the bank to save that money, mindful of what his mother told him. He's just stopped in for a sarsaparilla, but Lazarus has this chair open at his table in the back of the saloon...