But two months previously, a senior civil servant told education experts "the scale of the commitment does not allow it to be delivered in the lifetime of a parliament", the Labour leader went on.

BBC: New SNP minister Russell suffers education defeat

Two years ago, Facebook cofounder Mark Zuckerberg signed The Giving Pledge, a public commitment to give away 50% of his wealth or more during his lifetime or upon his death.

FORBES: Mark Zuckerberg Finds Giving Spirit, Donates $500 Million To Silicon Valley Community Foundation