No. What it does say is God predestined "
us" to adoption as sons (and daughters
). The "us" is defined at the opening of the letter as, "the saints," and those who have Jesus Christ as their Lord. The "us" is not unrepentant, unregenerate nonbelievers. That makes verse 5read as, "
He predestined us saints to adoption as sons through Jesus Christ to Himself, according to the kind intention of His will..." I think it important verse 6 be included because that finishes the statement by revealing the purpose of God's choice to predestinate the saints by His will: the glorification of His grace. This is the context Paul established for what he says later in his epistle at Eph. 2:5-10. It is by grace, through faith and not of ourselves that we've been saved. It is the gift of God, not of ourselves, that we've been saved. Paul's letter did not originally have the chapter and verse numbering. The later passage is couched in the opening of the letter.
Having already answered those inquiries, I'd like to note the divide between monergists and synergists is not that God chose
some. Everyone (except the universalist) looks around at the world as a whole and readily acknowledges some are saved and some are not. That's not a point in dispute. What is in dispute is
why God chose some in him before the foundation of the world and predestined
us for adoption. The monergist says it is God's will because that is what the text explicitly stipulates (mono = one or single; ergon = work). The monergists says it is due
only God's will because that is all the text explicitly stipulates. The cause is stated, and the stated cause is singular. So too is the purpose (His self-glorification, the self-glorification of His grace). The synergist does not dispute the matter is God's will. The synergist disputes the "
onlyism" of God's will. The synergist says the reason God chose the saints before the foundation of the world and predestined
us to adoption is because He knew who would believe. The synergists bring (their interpretation of) other verses from other books into the Ephesians epistle and apply them to the choosing and predestining. There is, in their opinion, at least two wills working together (sun = together; ergon = work) to bring about predestination (as well as all the other aspects of salvation).
Therefore, the synergist is not inclined to say God's choice is not unfair because He has predicated it on the sinner who believes versus the sinner who does not believe. For the synergist it is not God who is unfair but the monergist who is unfair. Monergism makes God unfair, not scripture and not synergism. This distinction is important because when a synergist complains about monergism making God unfair the debate usually become about whether or not God is fair instead of whether or not monergism is fair
. Is monergism fairly making God unfair, or is monergism justly, correctly making God unfair? That question is a red herring. I suspect the originators of that argument knew it because the criticism is rarely worded with that accuracy and honesty and few contemporary critics articulate the view that way.
And, of course, there is a passage that addresses the matter of fairness, but it does not specify predestination. That explanation is found in Romans 9's exposition of God's mercy. Romans was written
before the epistle to the Ephesians, so the original reader of Paul's letter to the Ephesians would likely have already been familiar with Paul's views on God's fairness. Estimates of the timespan between Romans and Ephesians range from three to seven years. That's plenty of time for the information to have circulated, and it likely would have done so given the theological enormity and import of the Romans epistle. If for no other reason it is very likely the Romans information made it back to every community of Jewish converts in the Roman empire all the way to Jerusalem.
The exact same divide I cited above reoccurs when reading the Romans 9 text because the synergist says the clay is pure (or at least has not lost its ability to choose) and was fashioned one way or another based on whether the clay believed (even though clay has no sentience), and it was God's knowledge of who would believe that determined His decisions. I use the word "
determined" to highlight the fact synergism is deterministic. It's God whose behavior is being determined by an outside influence, not the other way around. The monergist says the clay is not pure, it has been adulterated by sin. The clay was originally pure but through the disobedience of one man sin corrupted all the clay, and it is from sinful clay that God chose to fashion some for noble purposes. Here again, however, the text itself explicitly stipulates the reason for God's mercy is God's will. On this occasion the text also precludes both human will and human work. Human will and human work is irrelevant to God's choice.
That had been established many years prior to Paul writing to the Ephesians.