On a crisp morning in late March, an elite group of 100 young philanthropists and heirs to billionaire family fortunes filed into a cozy auditorium at the White House.

Their name tags read like a catalog of the country’s wealthiest and most influential clans: Rockefeller, Pritzker, Marriott. They were there for a discreet, invitation-only summit hosted by the Obama administration to find common ground between the public sector and the so-called next-generation philanthropists, many of whom stand to inherit billions in private wealth.

“Moon shots!” one administration official said, kicking off the day on an inspirational note to embrace the White House as a partner and catalyst for putting their personal idealism into practice.

The well-heeled group seemed receptive. “I think it’s fantastic,” said Patrick Gage, a 19-year-old heir to the multibillion-dollar Carlson hotel and hospitality fortune. “I’ve never seen anything like this before.” Mr. Gage, physically boyish with naturally swooping Bieber bangs, wore a conservative pinstripe suit and a white oxford shirt. His family’s Carlson company, which owns Radisson hotels, Country Inns and Suites, T.G.I. Friday’s and other brands, is an industry leader in enforcing measures to combat trafficking and involuntary prostitution.