I wrote on this on Sunday on my blog and will reprint in the comments.  

Leviticus was not so much revelation as natural law reasoning with authority attributed to revelation, although the quoted passages do capture the why of morality.  So does the saying of Jesus that he is gentle and humble of heart, his yoke is easy and his burden light.  This demands a humanistic morality, one that does not try to make us angels but more fully human - including in the economic realm.  

If we remember we are brothers, we will not make each other slaves as the capitalist does.  Nor will we persecute our brothers and sisters for expressing the sexuality they were born with.  Indeed, we will celebrate it in a Church wedding.  Instead of condemning either doctors or mothers to the criminal justice system for abortion, we will make it economically possible to not only continue the pregnancy, but see the child through to college.  The Dogma of Mercy must define what is sin as well as forgiveness.