From the Chassidic Masters

Vayak'hel and Pekudei: why they are joined (some years), why they are seperated (other years), why Vayak'hel comes first, why Vayak'hel took Pekudei's name and Pekudei took Vayak'hel's, not to mention the fact that both Parshahs appear to be almost entirely superfluous

If G-d is the source of all blessings, why work to earn a livelihood?