Oh my. I normally stay out of these things because they get me into trouble, but here goes head first.
Tithing is a concept trumpt up by the early "Christian" church after it became an acceptable institution. It was basically decided that the churches had to have income to support their professional clergy and to pay for buildings etc. So basically the whole thing boils down to economics.
I don't know about the rest of you, but any time we mix worldly institutions with heavenly ones we see sparks fly. In my experience anyway, the church has got itself into a bit of a pickle. They convinced people that they have to attend a meeting in a certain building, so they can collect offerings to pay for the building. Then they hire some poor soul to be the professional clergy of the church, who is supposed to be in charge, but is actually at the beck and call of each and every member of the church. They directly attach His/Her income to the income of the churches weekly offerings. So it becomes the pastors job to make the churches parishioners give, while not offending them so much that they either leave, or worse yet invite him/her to leave.
Imagine for a moment how a God, who is so powerful as to speak things into existance, might need us to create such an institution. I can't. Why? Simply put the denomination/church assembly is a worldly institution. Most church assemblies are incorporated, as non-profit businesses. One reason for this is so professional clergy and staff can draw a salary. Another is to achieve a tax exempt status. I do not think anyone had that in mind when the New Testament was written.
So tithes are not a requirement. Are they a good thing? Yes, for those who you bless with the tithe they are good. If that is your church assembly then they are truly blessed. Does God in any way need your tithe? No way. I would venture to say at this point that God could make wealth and all that it means disapear in an instant, and everyone would be on the same common ground, if He so wished.
I think it might be good to offer a reminder as to our mission, as the church. It is simply to spread the good news, to care for the poor, and to offer ourselves to God. A tithe, if we give it, should go to local missions, to food banks, to those who need the money to perform their God inspired duties this includes evangelists and missionaries but not professional clergy. If God deals with you to give the entire tithe to your local church, do it. If God tells you to give an offering do it. If you are so poor that you can't make ends meet, and you think giving a tithe is responsible, think again. God tells us to owe no man.
For those who think tithing is not for today, I would say, you have the spiritual freedom to make that choice. God is by no means going to go against what He told Paul. If you want to give alms, or offerings, instead of a tithe, that too is fine. God our Father is much greater than anything we can imagine, and surely has absolutely no need for your money. However, if you are in Christ, and you acknowledge Him as your savior and king, then all that you have is His, and you must do as He leads you to do.
Personally, my take on this whole issue is that we should be searching for ways to give to the work of the kingdom of God. When we see a place where He wants us to give, be it time, money, property or whatever, we should give it and without a second thought as to personal cost. While I haven't yet arrived, I try to do this myself.
Keep in mind that the love of money is the root of all evil, and if we resist giving to the King of kings what is already His, it makes a statement of whose side we are on. You cnnot serve God and Mammon.