The scriptures say to tithe to build the kingdom of god on earth. Since the LDSInc. leadership is not using tithes to build the kingdom of God, only building their investment portfolio, then my tithing is not doing what it should be used for. So by knowingly contributing to someone who is not using it properly, I am not paying tithing as commanded. I am the sinner for not following the commandments.
Last I checked, God doesn't like it when you blame some else for your in-action. Ignorance is one thing, but I can't see God being okay with someone knowing that they are not following a commandment and doing it any way.
So for me to follow the commandment to tithe to build the kingdom of God, it is my responsibility to title to organizations that do help the needy, comfort the sick, feed the hungry, etc. I know that my tithes go to the mission of Jesus when I donate to a food bank or a Shriner's Hospital.