Saudi Arabia’s $1.5 billion pledge this month to help Syrians return from refugee camps is a major boost to the government in Damascus, which is working to consolidate power and restart the economy after more than a decade of war. The package — tied to housing, infrastructure, utilities, and small business support — is more than four times larger than any previous Syria-related contribution from Riyadh, according to Karam Shaar Advisory, a consu…