If I make $150k/year and writeoff 30k, have I not recieved 30k tax free?

If I then open tax deferred accounts and open a trust have I not received more tax free annual income? If I fly to Europe and have one business related meeting, do I now have an income tax free vacation? Am I wrong?
Update: So my leased Mercedes is not tax deductable? The utilities that go for the study in my home is not tax deductable? Well...
Update 2: corag (below) If I spend the 30k on things that I like/want and write it off you don't see the benefit? Come on corag...

If I earn interest on tax defered income, you don't see the benefit? Corag...
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