One of the authors cited in Merit and Moses is Patrick Ramsey, who defended Moses in the Westminster Theological Journal and included in his defense the following point about the value of the law (third use) according to the Confession of Faith (19.6):
According to this section of the Confession, the curses (“threatenings”) of the Mosaic Law teach the regenerate what temporal afflictions they may expect when they sin while the blessings (“promises”) instruct them concerning the benefits they may expect when they obey. Saving faith “trembles” at these curses and “embraces” the blessings for “this life, and that which is to come.”
“To establish a connection between obedience and blessing and disobedience and cursing is for many—notably antinomians—to establish in some sense a covenant of works. The divines were certainly aware of this possible misunderstanding. After all, they debated this issue for years. Consequently, they made it explicitly clear that such a connection does not in any form or fashion indicate that man is under a covenant of works (Ramsey, “In Defense of Moses.” Westminster Theological Journal 66 : 14-15).
Aside from the danger of teaching a prosperity gospel (if you’re well off, you must be doing something right in God’s accounting scheme), Ramsey may have way more confidence in the Westminster Divines than he should about possible misunderstandings of obedience to the law since they lived at a time when lots of Christians regularly compared their own nation to the nation of Israel. This meant that wars were God’s judgment upon the people’s sin, and victory in war was a sign of God’s blessing. Proof of this in the case of the Assembly was their reaffirmation of the Solemn League and Covenant which more or less kicked off their deliberations of matters like covenant theology and law (and likely accounts for the confessional oddity of including an entire chapter on oaths and vows — I’d love to see a candidate for ordination pressed by a presbyter to defend Chapter 22).
Ramsey may be okay with comparing England to Israel. But I’ll take the cautions of republication about the uniqueness of the Mosaic Covenant when it comes God’s blessings and cursings upon the covenant nation. Israel was a type of the first and second Adams. England was not and still is not, no matter how much you invoke Shakespeare. And don’t get me started on the U.S. as a “Christian nation.”