While the likes of Chelsea and Manchester City have bolstered their squads, left-back Konstantinos Tsimikas remains the Reds' only new signing so far.
The Reds have been heavily linked with Bayern Munich star Thiago Alcantara but he says the club will only make a deal if the right player comes along.
"It was always the case. Always the case. This club, since I am here, and before, spends what we earn. That was always the case. I don't know why this is so surprising now, it's nothing new," Klopp said in an interview with Sky Sports.
"Pretty much everything we earn, we spend, if we have to in the moment. If not, we don't, because it makes no sense to throw money away.
"When I speak about the difficulty of the times we live in at the moment, people might think: 'Really? In football as well?' Yes! Surprisingly enough, in football as well! Uncertainty means uncertainty for all of us.
"It must fit to the group. Influence from outside, which a transfer is, can help, 100 per cent. If we can find the right player, it will probably happen, if not, then it won't."