Why not? Then the wealth can be distributed to everyone fairly. Having this safety net available for everyone and not just the rich would reduce the need for wealth hoarding in the first place. Your ideology has no justification besides your own particular interest in the class position of your offspring.
That's a truly horrendous position you've taken. You're arguing that it is somehow rational to not want a child to benefit from his or her caretakers. The only logical conclusion from this is why stop at death? Why don't we make it so it's illegal for a parent to take any action that provides any sort of benefit for their children, and all children are dependent upon the state from birth, with all adults paying a mandatory 'childcare' tax. This way all children can start out life on 100% equal footing, and also without any opportunity to experience what a parent's love and sacrifice really is. What a dystopian future you desire.
Actually, we live in quite a dystopian reality. Your only argument is a slippery slope fallacy. I never said that a child should not benefit from their caretakers. Only that they should not inherit economic wealth which they did not produce.
How so? You leave, they stop paying you. Any funds for retirement is your account. You leave the country and renounce citizenship, you no longer get the benefits of citizenship which includes social security. That seems pretty fair.
And yes a company doing that is a completely different situation. Like it or not we pay into a pool that if you are a citizen you will receive benefits. You also pay into an account for your 401k that you own. Renouncing citizenship, you walked away from the former account.