True, and the New Testament DOES "do away" with the tithe. If it did not, we would have to follow the Law. We would have to actually do what the Bible itself really says about the tithe, and not some made-up, "spiritualized" concept. We would have to:
1. Be landowners
2. Live within the boundaries of the nation of Israel
3. Tithe the annual increase of our crops and livestock
4. Observe the seven-year cycle, including the third-year "year of tithing," the Feast of Tabernacles, the seventh year of Sabbath, and the year of Jubilee.
There are NO exceptions to this. The Bible is very clear about the commands to tithe. It never changed the tithe to anything else and called it a "tithe." Either you must do exactly what the Mosaic Law said, or you do not.
The New Testament explicitly did away with the tithe:
Heb 7:5 And verily they that are of the sons of Levi [no exceptions], who receive the office of the priesthood [church ministers are not "priests," all believers are priests (1 Peter 2:9-10) and Jesus is our High Priest (Hebrews 9:11)] , have a commandment to take tithes of the people according to the law [the Mosaic Law that we are not under (Ephesians 2:11-16)], that is, of their brethren [only Israelites were subject to this command], though they come out of the loins of Abraham:
Heb 7:12 For the priesthood being changed, there is made of necessity a change also of the law.
Heb 7:18 For there is verily a disannulling of the commandment going before for the weakness and unprofitableness thereof.
Heb 7:19 For the law made nothing perfect, but the bringing in of a better hope did; by the which we draw nigh unto God.
The tithes of the Law were specifically linked to the office of the Levites. Because Christ did away with the Levitical priesthood with His one-time sacrifice, He is seated in the heavenlies, and He is able to sanctify and save His people to the uttermost with His effectual mediation, no tithes are needed to sustain His priesthood.
Yes, Christians need to give to ministry, but this has absolutely nothing whatsoever to do with "tithes." Period.