True, I didn't make a clear distinction between the two concepts. Anyways, I believe them to be quite a bit the same. Purchasing power is also an important concept too discuss and makes the difference between the two concepts.

I think it would be good to distribute incomes to a certain extent. Nobody chooses where he or she is born and which capacities are given to him or her. If we were able to distribute this money/wealth, I believe we should do this to such an extent that there's still enough incentive to put effort into your work