The current campaign is turning out to be one of the best in recent years, with the big teams struggling to assert their supremacy over the rest.
Chelsea, who won the league title last season, are just three points above the relegation zone, while Louis van Gaal’s Manchester United are in sixth spot.
Leicester City, who almost got relegated to the Championship at the end of last season, are level on points with leaders Arsenal at the moment, while newly-promoted Watford are just two points off the European places.
West Ham are also doing well, too, and currently find themselves eighth in the standings.
Bilic, who was appointed the London club’s manager at the start of the season, believes that the spending power of clubs in the Premier League has increased, leading to the bridging of the gap between the top four and the rest.
“This season is kind of logical. I will try to explain,” the Croatian told The Telegraph. “Clubs like Leicester, Palace, West Brom, Stoke, West Ham, Watford, all of them. Every single club is in a situation to buy good players. Good enough players.
“And those clubs that already have (good players), the gap was like this [hands apart]. Because in Chelsea you had Costa, Fabregas, that one, that one, Hazard. But Crystal Palace didn't have Cabaye. Now with this (television) money.
“And next year is going to be even more the possibility that these clubs can buy these players to close the gap.”