Title on this referenced article is "Bill Gates thinks the 1% should foot the bill for renewable energy, and he's offering the first $2B." It does look to be spinning off the Atlantic 2015 interview.

The 1% headline is just a left-wing dog whistle. Gates said "private sector" and didn't make a divisive statement.

For those that the class-warfare-esque headline speaks to ("Oh yeah! Those 1% need to pay!"), the "1%" are the reason we have nice things - because they want them. Put everyone in equal misery and then lets see how clean the air and water is, how many technology and medical breakthroughs we get, and so on.