Great Philanthropists, despite having tons of money, after a certain stage in their life, no more they show interest in heaping money. They are immensely pleased with that satisfaction that they have done something good for the welfare of the humanity.

Only when all your expectations are fulfilled. But are they ever? 

It is understood that those Philanthropists after satisfying themselves that all their expectations are fulfilled, they started their good deeds without any returns.

No one ever does anything without expectations. Let us be clear on that. Rich philanthropists get tax exemptions, which are available to ordinary tax payers also. Frequently when funds are collected for flood/ earthquake victims ets a entertainment show are organised for the donors. If such returns are not there then many philanthropists do it for their spiritual salvation towards the end of their lives. It is very rare that some one is giving without any expectation.

Neha Sadana wrote:

There is always an expectation against an action either its cash or satisfaction, that depends on a person. If you feel satisfied with a particular deed or charity, you will go for it again. Sometimes you expect that satisfaction and sometime it comes of its own.

Satisfaction and peace of mind are also expectations, but they happen naturally even if you expect it or not. They reflect in your inner world. You cannot demand it from anybody if it does not happen of its own.  In the other case, you expect compensation against your work because you deserve it, and ask for it if you do not get.  

Anyhow according to you such philanthropists are rare. RARE doesn't  mean that there are none. And about  those RARE people we are talking and discussing about.

Are you aware of such RARE persons. We may like to know about them.

Google search will throw lot of light in this matter. Do some homework.

https://en.wikipedia.org/wiki/Individuals_and_groups_assisting_Jews_during_the_Holocaust

It is hard but possible if we put our hearts and mind to it. It is a matter of discipline your mind. The Bible would say thus - Never tire of doing good.  If we expect anything in return we would become weary and slacken in our deeds. 

Sounds difficult but to attain eternal life is not an easy task. 

Good things are always difficult. They have to be achieved by shedding sweat and blood.