Four political parties sent a letter urging him to stop the planned changes to the Child Adolescent Mental Health Service.
The Deputy PM says the Government is trying to facilitate DHBs to "be more generous" in their pay offer to nurses.
"We're just enormously grateful for the love, and cards, and prayers," Simon told his More FM colleagues this morning.
About 27,000 nurses, midwives and healthcare assistants voted to strike for two full days next month.
"The Government has to balance pay demands across the public sector. We have gone as far as we can in terms of extra Government money," Dr Clark said this afternoon.
Ms Ardern is due to give birth on Sunday, but her final week of work hasn't gone smoothly.
Following the publication of the video, Queensland deputy premiere Jackie Trued said they show why establishing safe zones outside clinics for women is critical.
HIV-positive childcare worker Gayle Jonker says she was "humiliated" by having her status publicised to parents by staff.