Maybe a look from a Professional Point-Of-View will help to understand their situation ...... they r paid professionals as is everybody else who goes to work to earn him/herself a living ...... u work u get paid = simple as that ...... u don't get paid = u talk-> protest -> even go on strike ...... that's mostly the case anywhere in the world
Or do u work for free ????
there are other ways to protest then refuse to take the field when you r playing for national team