Of course that is way too broad a statement. Luther/Lutherans accept predestination of the saints. It IS the Word of God. Lutherans disagree with other doctrinal points of Reformed theology. I view Reformists that hold to salvation via Grace through Faith without merit as a gift from God, not of works; as a brother/sister in Christ. For that matter, a selfsame professing Catholic/Pentecostal/Baptist/etc. That view is Scriptural.
Luther's initial views were against material corruption
That is one way to put it, but if you read the 96 theses, it would appear that Luther's complaint was also against the corporate corruption, so to speak, that allowed that type of error to flourish. Subsequent actions by the Pope expanded the complaint opportunities.