It's funny but, In the Bible, I can't remember even one instance of Jesus allowing someone to suffer because he thought it would gain them a reward in Heaven.
He didn't do it himself, but he explained that this is how it works:
Luke 6:20-26
20 And turning His gaze toward His disciples, He began to say, “ Blessed are [j]you who are poor, for yours is the kingdom of God. 21 Blessed are [k]you who hunger now, for you shall be satisfied. Blessed are you who weep now, for you shall laugh. 22 Blessed are you when men hate you, and ostracize you, and insult you, and scorn your name as evil, for the sake of the Son of Man. 23 Be glad in that day and leap for joy, for behold, your reward is great in heaven. For in the same way their fathers used to [l]treat the prophets. 24 But woe to you who are rich, for you are receiving your comfort in full. 25 Woe to you who [m]are well-fed now, for you shall be hungry. Woe to you who laugh now, for you shall mourn and weep. 26 Woe to you when all men speak well of you, for their fathers used to [n]treat the false prophets in the same way.
IOW, if a person is poor, hungry, and miserable now, then he will have reward in Heaven. If he is rich, well-fed, and happy now, then he will be made to suffer.
... so if you see a poor, hungry, weeping person, you can do one of two things:
- nothing, thereby ensuring them the great reward in Heaven that Jesus described, or
- you can enrich, feed and comfort them, which might make them happy now, but will be denying them a much greater benefit in the process.
If you truly care about the other person and you truly believe Jesus' words, then the compassionate thing is to let the person suffer, trusting that God will reward them for it, and that he will, in due course, provide that person with comfort far beyond what you could ever hope to give yourself.
The alternative is to give him short-term, imperfect comfort and in the process deny him that overwhelming future benefit.
Jesus explained that in the long run, poor, hungry, miserable people are actually going to be much better off than rich, well-fed, happy people. If this is really the case, then why on Earth would you ever want to take poverty, hunger or misery away from a person? These things are the person's "Golden Ticket"!
... if you believe Jesus, that is.