More on Reincarnation
More on the idea that progression through lifetimes is not linear: Just because a person is living a relatively easy experience in this lifetime, does not mean that in a previous life they made some choices they will have to balance in experiences their soul chooses in a future incarnation. This present lifetime may be a life of rest for them.
I think it is very important to realize that a difficult experience in the present lifetime does not mark a person as lower or worse than a person having an relatively easy experience in the present life.
It might be that the person undertaking the difficult life has chosen to tackle some deep issues, for example, some of the very difficult situations undertaken by, for example, Joan of Arc or Saint Francis of Assisi. Furthermore, they may have taken on an easy resting life before the one in which they tackled the difficult issues.
As always, it is best not to judge or to compare ourselves with others.