Perhaps it was the other way around: If someone is successful, it shows god's (special) favor. Since, either way, they are thus equivalent to anyone who cannot see god's will, it is good to be successful.
Except it's not, because they had a robust view of calling, vocation, and God's sovereignty.
"If we look externally, there is a difference between washing dishes and preaching the Word of God, but as touching pleasing God, none at all" -William Tyndale
" Let the people of God comfort themselves in all cases by this doctrine of the divine decrees[God's Master plan]; and, amidst whatever befalls them, rest quietly and submissively in the bosom of God, considering that whatever comes or can come to pass, proceeds from the decree of their gracious friend and reconciled Father, who knows what is best for them, and will make all things work together for their good. O what a sweet and pleasant life would you have under the heaviest pressures of affliction, and what heavenly serenity and tranquillity of mind would you enjoy, would you cheerfully acquiesce in the good will and pleasure of God, and embrace every dispensation, how no matter how sharp it may be, because it is determined and appointed for you by the eternal counsel of his will!" - Thomas Boston
"The action of a shepherd keeping sheep is as good a work before God as a minister in preaching" -William Perkins
Heh even found this quote by Baxter who didn't believe in predestination, but individual salvation, yet he still valued the community and it was his value of the community and God that drive his work ethic:
"The public welfare, or the good of the many is to be valued above our own. Every man, therefore, is bound to do all he can for others, especially for the church and commonwealth" -Richard Baxter