I propose a redistribution method:
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The lost coins are already redistributed in the sense that thanks to this, due to scarcity, the bitcoins of the other holders are worth more.
People will be incentivized to not lose them; not like back then when bitcoin was merely a few cents so people didn't care much about their private key backups.
Far fewer bitcoins are lost today than in the beginning, when people mined them on their laptops, at a time when they were worth pennies and they didn't know if they would still be around in a few years, nor did they have options for spending them as they do now. They will always continue to be lost, but in percentage terms much less.