Step 1: Terminally ill people should have the opportunity to end their suffering on a completely voluntary basis.
Step 2: See step 1, but terminally ill patients cost society a lot of money.
Step 3: Yes, we pay for your treatment, but there are easier ways to end your suffering.
Step 4: We don't pay for your treatment, but there is an alternative.
Step 5: Can you please finally kill yourself? You are a burden to society!
Step 6: We will kill you.
UK is now at step 1, Canada somewhere between 3 and 4. We'll see how far they go.