As serious Buddhist practitioners, I do feel and think that doing dharma work fulltime is the best thing we can do to repay our Guru's kindness and the protector's kindness. The main reason why we do pray to our protector, or any Dharma protector at all is not for temporal gains but actually for conducive conditions for our Dharma practice. What could be more beneficial to us than serving the Lama and the Dharma directly? Else, why would we adhere to our teachers and pray to the protector?
By working fulltime in Dharma, and assuming that we have a good and high paying job before we decide to do Dharma work fulltime, we are actually practicing renunciation in action as we leave our daily work jobs for something higher, something with a bigger goal, that is to attain liberation or to benefit others, depending on what the original motivation was, and to help support a cause that would lead more people into happy states and to lead people to liberation from their sufferings, both temporal and ultimate. That would be my motivation to work in Dharma fulltime.
With that said, sometimes i do lose track of my motivations. Although my motivation when I do not forget is to serve others and to benefit them in a better, more permanent and lasting way as compared to the other available methods in samsara, i often ignore the pleas and requests for help from my own Dharma colleagues and if they cannot finish their work, their own timelines suffer so if I refuse to help them because i am too afraid that it will also affect my personal work, is that not selfishness at play? Which is why I always try to help my Dharma colleagues whenever they need help no matter how busy I am because it will contradict directly the Dharma if i focus on myself and ignore their requests and thats kinda like the conclusion i come through.
In the end, I guess, motivation and mentality is very important. We can be in Dharma but the Dharma will not be in us if we are hard and resistant and bitter and unwilling to let go of old ideas of how office life is supposed to be and apply those principles in Dharma. It wont work because Dharma and samsara do not mix. If we do Dharma work but we backstab others and think of only how to gain fame and recognition, then we are not doing Dharma at all. We are just doing normal work. This is a thing to consider and contemplate on