Answer:
Some important jobs would be:
- Farmers: if the region is fertile enough, farmers are crucial, simply because they produce most of the food that will be consumed in the area.
- Law enforcers: any area needs some form of law-enforcement, no matter how anarchic it is.
- Doctors: some medical practitioners are also needed, in order to tend the sick and wounded.
- Merchants: a few merchants are also needed, in order to help with the importing and exporting of goods (trade).
<em>Civil wars and foreign invasions showed that the empire had become too large to be ruled by one person.</em> :-)
I think your question means how did the discovery of gold contribute to the creation of the transcontinental railroad. There had been some movements toward westward settlement in the 1840s, but that trend accelerated dramatically with the discovery of gold in California. James Marshall's finding of gold at Sutter's Mill in California in 1848 led to a "gold rush" in the decade that followed, with 1849 seeing a huge influx of people to California. (Thus we refer to the '49ers.) The swift settlement of California added incentive to build a transcontinental railway. The Pacific Railroad Act of 1862 established the charter for doing that. The First Transcontinental Railroad was completed in 1869.
So they could have more of a say?