Satoshi could have created a system that would make payment easy and then eliminate the third party involvement in transactions, but I am sure that he would never think of making it to eliminate tax because without tax, the country he is leaving would not have been as developed as it is now for him to be able to leave comfortably in it.

We all know what tax is all about, let us forget the fact that we have some government that are not using it rightly, but the purpose of tax is to maintain a country and without that tax, the country may just be in a serious mess, and even if satoshi had not talked about tax, I am sure that he would never be against it. Tax is part of government and no one can take that away, if government would not have a way to tax bitcoin, and then just know that they will declare it illegal.