I would mitigate it a bit but not eliminate it. I think the goal here is "fair enough", but not "totally fair, all the time".
Agreed, but we ought to strive to minimize such encroachments.
There is some good science concerning motivation, and while of course there are individual differences, there are also virtually universal truths about motivation. It turns out that Dan Pink has done a really good job of making current motivation science accessible in his book "Drive". AND, the short video linked to below does a great job of summarizing the book. I can summarize it even more here:
Healthy, sustainable motivation is based on: autonomy, mastery, and purpose.
While I think some limits should apply (again via graduated taxes), providing for one's progeny is a prime motivator.