That's not the impression I got from the blog post, I thought you meant that satoshi DID spend money.
Please point me out where it seems that, maybe my English was not precise enough to express it.
Also, Satoshi's coins may now be valued at 100 million USD, however if Bitcoin hits mainstream where 0.000000000000000000000000000000000000000351(and this is very inaccurate example) is your salary, imagine what having a million bitcoins would mean. It would mean he would have money enough to buy a continent and he could control the world.
But by then, the majority of people will agree that at least 75% of Satoshi's coins have to be blocked from being valid in the chain.
I've never thought about this kind of confiscation. But it would be terribly non-equitative, brutal, and not useful, since maybe there is other people holding as much as that coins, but in hundreds of small transaction outputs.