You have an opinion of what the constitution means, that is quite different from that of the courts. But to go back to that often misinterpreted document, the remedy for congress, if it feels that this signing statement is beyond the pale, is to impeach the president. So as a practical matter, Obama can appoint czars, and those czars will be paid, and until you can count 67 guilty votes in the Senate, that is the actual state of the law.