The Spanish transfer window shut on Friday night, with Barcelona failing to add to their signings of Ousmane Dembele, Nelson Semedo, Gerard Deulofeu and Paulinho, despite coach Ernesto Valverde stating publicly he wanted a stronger squad after losing Neymar to Paris St Germain for a world record fee of 222 million euros.
According to reports in the Spanish media, Barca made a late bid to try and land Angel Di Maria from PSG although their main target remained Coutinho, who Liverpool coach Jurgen Klopp repeatedly insisted was not for sale.
"Late last night Liverpool priced the player we wanted at 200 million euros, and we decided we would not do it," Soler told a news conference on Saturday.
"It's a sign of the new era of football, one which isn't led by clubs. Something has to change, we won't play along with this new way of understanding football. We didn't want to risk the patrimony of the club, a club of 150,000 members which needs to be managed coherently and responsibly.
"We are in a market where you pay 50 million for a goalkeeper. We will not play along with a market that may not have lost its way entirely, but something has changed. This board will not put the club at risk."
Liverpool could not immediately be reached for comment.
Soler said Barca's main problem in trying to acquire new players was that other clubs were trying to get more money out of them following Neymar's world record sale.
He also said football was changing as now wealthy countries, rather than the clubs themselves, were calling the shots. PSG, who are owned by Qatar Sports Investments, not only acquired the services of Neymar but also signed France forward Kylian Mbappe, considered the most valuable young player in the world, on a season-long loan.
"PSG came to us with 222 million (for Neymar) and that meant everyone knew we had money. When you go to the market and you have a lot of money, the demands made of you are extortionate. We found ourselves in unbelievable situations," added Soler.
"What has happened in the market this year takes us to a model of football different to the one we are used to. We used to be the ones that lead the market and now countries and investment funds are leading it. Countries have become the main agents in the football world."