QPR released accounts this week that showed their wage bill had doubled to £56million in the year to May 31, 2012.
They have since strengthened further with a number of high-earning players brought to Loftus Road, including Loic Remy and Christopher Samba in January.
The outlay has yet to reap its rewards with QPR bottom of the Barclays Premier League with 10 games remaining.
Relegation could have serious implications but Redknapp, who took over in November after Mark Hughes was sacked, is convinced the owners know what they are doing.
"If the debts are high the chairman and the board must understand that," he said. "They're not silly men, they're successful businessmen. They know what they're doing so I'll leave it to them. It's their business.
"It's important obviously (to stay up). But when you are a football manager we are not involved in that side of the business.
"I've said it a million times, we are not involved in players' wages.
"That's done at a different level to what we work. We work with the team and on the pitch. The financial side of it I don't know. Those results were from before I came here."