Read a fantastic article recently about Lingard's 100k a week and what it does to players like Dele Alli who have massive superstar potential in terms of both marketing and ability.
It basically said, imagine how Dele Alli felt, having the season that he's had, signing a £50k a week deal, only to glance across at Jesse Lingard, having less of an influence on his team and see him signing a £100k a week deal.
The timing was perfect for United. It means Dele Alli holds the cards at the negotiating table for wages, and more likely to be in a position to unsettle him at Spurs, should a query for his services come in and be refused. He would be able to ask for more to be on par with other English talents. He would know he would be paid more at other clubs and possibly seek the big move quicker.
Despite the history that we advertise attracts new players, it really isn't just that anymore. It's marketability and that's what United have over any other club