Sorta like this?
Everybody else is being a pig at the trough, why shouldn’t I, huh?
Your emotional, label infused argument assumes that the system itself is wrong, but you never impugn the system. Instead, you try to emotionally intimidate those that are in it.
It’s also legal to deduct interest on a home loan from your taxes. Do you consider doing that immoral, as well?
Or do you only consider it immoral for those who are conservative?
That is how you are presenting your argument, IMO.