It isn’t what goes around comes around but more whatsoever a person does in life is visited back on them as a multiple of the dimensions that it is done in. Funny thing is that those that do a great amount of good is like storing up tension in a spring. Because of the nature of things that force can not be released because of physical limitations.
This limitation is transcended on the permanent separation of the spirit and the body and all that stored up karma both good and bad will be returned to its owner of course as a multiple of the dimensions in which it was done. For some this will be heaven but for others it will be less joyous