wealthfare
Welfare or other financial aid or assistance that benefits the rich or upper class.
I delivered your letter to Sir R. W. who directed me to give you his humble service & thanks for it, & to assure you that no friend you have is more concerned for your wealthfare, or more sincerely desires your health which he thinks of the most utmost importance both to himself & the publick
Where it comes from
Blend of wealth + welfare or wealth + fare. First use appears c. 1923. See cite below.
Adapted from the Wiktionary entry wealthfare (CC BY-SA 4.0).