I agree with him because imo he states as Is.
Weaker C$ means we pay more for imports from every one not just US. On the other hand we get less from Every One for our exports.
Weak dollar represents a false impression of a strong economy by making our exported products appear cheaper to every one else and so that our production should rise provided we can afford to produce at that lower cost. If we get more production vs loss of dollar value, that may be ok, but usually that is not so and the economy slides further down.

Per your gold miner's example, what advantage is there if a miner sells his product for less than he would other wise get. Would he be able to produce more and offset the price drop? Obviously not, some mines have closed as a result.

May I also add that Goldman Sachs among other bankers was a large contributer to Greece's downfall.

However I do agree with you regarding taxation. All of these means are used to make the ordinary guy poorer and the bankers fatter because we become indebted to them.