yes but in the example I gave you ..you've claimed back $1500 in...

yes but in the example I gave you ..
you've claimed back $1500 in tax savings for your $5000 carpets but you will now need to pay $15000 for the carpet .. so you're down $13,500 in dollar terms.

So ..the depreciation tax saving of $1500 which started at 30%/annum of the original purchase price, now equates to 10% of the replacenment cost... so what started off as a 30c in the dollar benefit over the first 5 years , has become a meagre 10c in the dollar benefit.