Tax law is dependent on your country and locality. Recently in the United States, the IRS has declared that Bitcoin is to be treated as property, not currency, for tax purposes. All income in the US is taxed, regardless of what form it takes. If youre paid in bitcoins, youre supposed to pay taxes on your earnings at the BTC/USD exchange rate when you receive payment.
Is it a good decision or bad?
If you will ask me about if its good or bad to pay taxes, well it is good if in your country bitcoin is legal and all of your paid taxes will go to a government funds that will helped your country to their needs. Bad if at the first place it is not legal its just a waste of money to pay then they will not allowed you to happened. Hopefully, some countries are getting an idea on how or ways to accept bitcoin.