The 32-year-old has hit out at critics of the club's highly-paid players in their wake of their derby defeat to Eintracht Braunschweig last weekend
Dieter Hecking's side have bagged just eight points from their opening nine games in the Bundesliga this season and suffered an ignominious 2-0 derby defeat at home to Eintracht Braunschweig last weekend.
Wolfsburg have been in steady decline ever since their incredible title triumph in 2009, with some suggesting the squad are happy to accept mid-table obscurity while being bankrolled by the fortunes of the Volkswagen group, but Polak has lambasted such claims.
"We always hear that we are nothing but f***ing millionaires. No, we're not," the 32-year-old is quoted as fuming by TZ.
"It's always the same: 'In Wolfsburg, players only want to earn a bit of money. Maybe they'll play a bit of football, but they'll have a lot of fun.' The stereotype annoys me massively.
"To hear these allegations again and again is not good for the head. We're not the f***ing millionaire troupe. That we lost to Brauschweig was nothing to do with money. We played badly. If we had won the derby, they would not be asking us to show our passion.
"Of course you might get a bit more money if you sign a contract here. Then you must put in performances to earn that money. You have an obligation.
"There is something special here. Everyone knows VW is in the background, so VFL brings in many good players and maybe pays them a little more. The money is offered, but it's not simply a case of taking it easy. We also have a special responsibilty."
Wolfsburg's next Bundesliga match is against Augsburg on October 20.