I will write software that will be released under a GNU license because the entity that bought my time to do it can decide to put the result under whatever lice

I will write software that will be released under a GNU license because the entity that bought my time to do it can decide to put the result under whatever license suits their goal. However, if the result of my work will be made available under a more permissive license i (most likely) demand less money since it ensures that i can reuse whatever i wrote.