The real point of interest with respect to works, is that the Calvinist refuses to accept the fact that God, in His sovereignty, is free to place conditions upon one receiving salvation.
Did He place conditions upon receiving salvation? The question is not what He can do but what did He do? If He placed conditions of receiving salvation, what are they and where do you find them in the scriptures?
In the Calvinist's view such conditions would constitute works and Paul has stated that salvation is not by works.
That is because they would be works. A condition met in order to receive salvation is something man must do and provide. If man must provide something then Christ in insufficient without man's participation.
Paul's argument of not by works is not that perfect obedience to God's law wouldn't provide for salvation. His point is that no one has ever, nor will ever, be perfectly obedient
That is not his argument at all. Yes, no one can keep the Law and so be saved through it, but neither can any work save us.
Romans 4:1-6 What then shall we say was gained by Abraham, our forefather according to the flesh? For if Abraham was justified by works, he has something to boast about, but not before God. For what does the Scripture say? "Abraham believed God and it was counted to him as righteousness.
Now to the one who works, his wages are not counted as a gift but as his due. And
to the one who does not work but believes in Him who justifies the ungodly, his faith is counted as righteousness,
Eph 2:8-10 For by grace you have been saved through faith. And this in not your own doing; it is the gift of God, not a result of works, so that no one may boast. For we are His workmanship, created in Christ Jesus for good works, which God prepared beforehand that we should walk in them.
Notice how closely those two passages parallel each other in language and message. And what was said to Abraham was said long before the Law.
The problem is us. God knowing that needed to provide an alternate means; He did that through the sacrifice of His Son for the sins of the world. That alternate means is precisely the gospel message.
We were redeemed by the sacrifice of His Son through faith, but that was not an alternate means. It was the fulfillment.