From FY 2013:

Warren Buffett: He made $12.7 billion this year or ~$37 million per day; ~$1.54 million per hour; or ~$25,694 per minute.
Bill Gates: He earned $11.5 billion this year which works out to be ~$33.3 million per day; $1.38 million per hour; or ~$23,148 per minute.
Sheldon Adelson: The casino mogul earned $11.4 billion this year which means he made ~$33 million per day; ~$1.38 million per hour; or $22,946 per minute.
Jeff Bezos: He made $11.3 billion this year or ~$32.7 million per day; $1.36 million per hour; or ~$22,745 per minute.
Mark Zuckerberg: The Facebook founder made $10.5 billion this year or ~$30.4 million per day; ~$1.27 million per hour; or ~$21,135 per minute.
Masayoshi Son: He made $10.3 billion this year or ~$29.86 billion per day; ~$1.24 million per hour; or $20,732 per minute.
Sergey Brin: He made $9.3 billion this year which works out to be ~$26.9 million per day, $1.12 million per hour; or $18,719 per minute.
Larry Page: He made $9.3 billion this year which works out to be ~$26.9 million per day, $1.12 million per hour; or $18,719 per minute.
Lu Chee Woo: He brought in $8.3 billion this year or ~$24 million per day; ~$1 million per hour; or ~$16,706 per minute.
Carl Icahn: The billionaire investor made $7.2 billion this year, which works out to be ~$20.87 million/day; ~$869,565/hour; or ~$14,492/minute.
SOURCE: http://www.businessinsider.com/what-warren-buffett-makes-per-hour-2013-12
So, a billionaire makes about as much as the average schmuck working three part-time, minimum wage jobs for a year, per minute. Then, they move it offshore.