Our elected officials work for the public and most people on slashdot have a fit whenever one of them uses a non-official account to conduct official business, since communications about taxpayer business, written on taxpayer time are considered to be available to the taxpayer through FOIA, etc.
Nokia further owns the email systems, so it's not like them monitoring texts from an employees personal cellphone. I have had a work cellphone; it was always known that the employer got the bill at the end of the month and could see the records of calls made. If we wanted to make a call and hide it from the employer, we *gasp* used our own methods of communication.
Anyone can make an omelet with eggs. The trick is to make one with none.