It's an interesting idea but a bit 'gamey' (that is, like a game, not deliciously rich-tasting meat) - it would suggest insurance companies refuse to insure rich people.
That would effectively make it impossible to fly big ships or do PvP in them.
Even if you have billions in assets, that doesn't mean that you have billions in cash.
What we need is FDev taking a stance against combatlogging. No increase/reduction of rebuys or a dividing of open/solo/pg will solve that problem. As far as I know it's technically hardly possible to solve it, so the only effective means is the devs punishing known loggers. Shadowbanning for example (at least temporarily) would be a usable mean.