True, death is the wages of sin.
Exactly.
But you would be remiss in saying that therefore all sins are equal.
I don't know that a hierarchy of sin does much for us, accepting the idea, if all sin leads to death and requires grace. And I'm concerned that involving ourselves in that consideration will tend to create caste systems and the mistaken sense of a hierarchy among sinners instead of an understanding of our common equality in meriting a thing no man should desire.
Rather, avoid sin and leave the judgement of it to God, who told us what the end of every sin is absent grace.
Do not judge according to appearance, but judge with righteous judgment.” - John 7:24
http://www.biblegateway.com/passage/?search=John7:24&version=NKJV
Which means we need to know what the correct judgements are in the first place. That means not following clichés, such as that all sins are equal.
I disagree on your last for the reasons offered prior and above. On the first, I think it's speaking to something other than what I am speaking to and I'd say we absolutely should examine claims to moral truth by scripture and not by how they appear or appeal to us at first blush, which often has more to do with our interest than God's.
A quick google search brings me to this article, which does a fairly decent job explaining this.
https://www.christiancourier.com/articles/966-are-some-sins-greater-than-others
Thanks. I'll give it a look.