Since you are studying a Masters in Econs, you should know that pay is determined by demand and supply in a particular industry, not the paper qualifications you have. The pay an econs teacher gets and the pay an IB analyst gets will obviously be very different.

If you don't even know what field you want to pursue, then you really shouldn't be worrying about starting pay. You should be worried about getting hired in the first place. Nobody wants to hire someone who doesn't care about the industry and is just interested in starting pay.