Ending the carbon tax now would result in them having less money available.
That doesn't actually help them.
It's a typical conservative talking point. Take a complex system, make it sound simple, pitch a simple solution (that in reality won't fix anything and actually usually makes thing worse), people who don't understand the complex system latch onto the simple solution, then when the simple solution is implemented it doesn't fix anything but no one questions why.
We see his with conservatives time and time and time again, it's sooo frustrating. I wish the economy was as simple as they claim it is.