He was asked if he would resign if "the economydoes take a hit next year” when Brexit happens."
Rees-Mogg insisted the full impact will not be known for “years to come” as he hailed leaving the EU as the “greatest opportunity, economically, for this country”.

He said, “The overwhelming opportunity for Brexit is over the next 50 years.”

Huff Post, " A leading Brexiteer (Rees-Mogg) has suggested it could take 50 years to judge whether Brexit has been an economic success"
https://www.huffingtonpost.co.uk/entry/jacob-rees-mogg-economy-brexit_uk_5b54e3b5e4b0de86f48e3566