No doubt it would be better for the image of Bitcoin and for the perceived fairness of the system if this did not happen. But, to play devils advocate, Bitcoin is so decentralized already and would be much more so by that point that it would be pretty hard for Satoshi to exert any kind of undue influence over the network itself just because of his wealth.

Also, it wouldn’t be that far removed from current near trillionaires under the fiat system, but it all depends how you measure the available supply of dollars etc