West Ham United co-owner David Sullivan has promised to bring in players for the short-term gain of the side.
Sullivan confirmed that West Ham would not be buying for the future, but for the present in the summer transfer window.
The Hammers are set to move to the Olympic Stadium, and they have ambitious plans - as they look to become top four contenders.
And Merson said: “I like what David Sullivan said the other day; they have to buy people for now and they can't buy a load of kids and have two or three seasons.”
West Ham have a wonderfully productive transfer window last summer, with the likes of Manuel Lanzini, Dimitri Payet and Michail Antonio arriving.
The Hammers have already started making plans for the upcoming season, with bids lodged for a range of players.
West Ham have already been linked with the likes of Alexandre Lacazette, Jamie Vardy, Theo Walcott and Chrisitan Benteke, which highlights the ambition that they have.
The Hammers have also reportedly had a bid of £25 million for Bournemouth duo Matt Ritchie and Callum Wilson turned down.
West Ham finished this season in seventh place, and they could yet be in Europe next term - if Manchester United win the FA Cup at the weekend.