Essentially immigration on a balance sheet is a 'sugar high'.
Voltaire was also against democracy, since he believed that people were inherently selfish. He thought that government run by the people would be carried by their own selfish interests and not with an idea of "virtue," the notion of putting civic duties before one's own private interests. In this way he was quite similar to some of America's Founders who did not believe that all citizens should have equal power in the government.
Intriguing n'est pas?