Pogba returned to Old Trafford for a then world-record fee ahead of the 2016/17 campaign and the 24-year-old midfielder has gone on to score 11 goals in 57 appearances for the Red Devils.
Many believed United overpaid for Pogba and Marotta appears to have mocked Ed Woodward for spending so much on the iconic France international.
Asked about Gonzalo Higuain’s move last year, Moratta told Il Giornale: ‘You can not do such a deal every year. Higuain had created an opportunity to leave Naples at an opportune moment in which we decided to make that investment.
‘But you can not think of doing it every year. That transfer was closed before Paul’s move to United was finalised, which was predictable and of course facilitated the Pipita deal.’
Quizzed on the greatest deals he’s ever pulled off, Moratta replied: ‘[Pierluigi] Casiraghi signing for Juventus was the sign of progress.
‘Signing [Antonio] Cassano from Real was special: it was pure emotion because it was about recovering a talent.
‘The Pogba deal to Manchester United: the biggest personal achievement.’