The Magpies feel they cannot spend too much on new players but in comparison, Pardew has seen Monday night's opponents Manchester City bring in a number of new faces for around £100million this summer.
Pardew suggests FIFA's plans to level out spending have not worked, saying his club simply cannot compete with those awarded money for playing in Europe.
"The teams in the Champions League positions with that extra revenue is beginning to be a concern.
"Financial Fair Play was supposed to even things out a bit, but it doesn't seem to have had any impact at all.
"Our business model is such that we can't generate money like City can, therefore the gap remains."