The distinction between one's ambition and the rest of one's circumstances as deployed by Dworkin draws a certain concern for individual freedom and responsibility into the account of distributive justice. If we start from initial fair shares, and then you pursue fancy vegetable farming, risky but potentially lucrative, and I put my resources in a bank account, and you end up with a more intrinsically rewarding and lucrative work life than I manage to get, the differences in life outcomes at which we arrive are not inequalities that register as unfair or as demanding equalizing compensation in Dworkin's framework. Welfare or well-being inequalities across people are not a concern of social justice, in that framework.