Public worker unions continue to join in the legal action against Gov. Chris Christie's plan to significantly slash pension contributions over the next two years, but the governor doesn't seem worried at all.

Governor Chris Christie (Governor's Office/Tim Larsen)

At a press event in Camden on Monday, Christie expressed strong confidence that his plan will hold up in court, and admitted there is no "Plan B" to balance the budget if it's ruled he's breaking the law.

"This is the plan," Christie said, noting there have been no other solutions suggested by anyone else. "Since I've announced what the plan was, you have not heard boo, nothing, from anybody else in a position of leadership in the state, saying they have a different plan that's able to fill the size of the gap that we have."

Under Christie's proposal, contributions to the pension fund for public workers would be diminished by nearly $2.5 billion over the next two budget cycles, in order to help erase a massive shortfall in revenue collections.

Unions for public employees, which have filed lawsuits against the plan, suggested Christie is breaking the law by neglecting to make the promised payments.

The lawsuits are expected to be consolidated and heard on June 25, just days before a signed and balanced state budget is due.

"This is not something I want to do, but when revenues fall as short as they have, you have little or no choice," added Christie. "I have complete confidence that ultimately anybody who looks at this will see that this is what we have to do."