While any legalization of euthanasia is fraught with difficulties, ambiguities and opportunities for misuse and corruption, it comes down to a fundamental question:
Anyone who answers yes (even with significant qualifications) to this question does not respect other's rights to make their own decision. They claim that they are more capable of making decisions for the others around them and are in fact corrupt themselves.
Equally, anyone who thinks that any form of assisted euthanasia should not be subjected to the strictest workable safeguards, is also corrupt.
See