To boil down to something is to be, in the end, a matter of one simple thing. It all boils down to money.
It claims to have reduced a complicated matter to its essence, which is sometimes true and sometimes a trick. The picture is from cooking, where boiling reduces a sauce to what matters.
1phraseboil down toTo be, in the end, a matter of one simple thing.
“The whole argument seems to boil down to who pays for the survey.”
boil down to is a phrase.
Practised in Phrasal Verbs