@mischievoustomato I want it to be very clear that I do not advocate for the following position, but that I am simply explaining why someone reasonable would have this type of position.
The flaws in the below are obvious to those of us who the government just hates - but people who were treated better by the government than their parents tend to dismiss points related to that.
----NOT MY OPINION----
People who clawed their way out of abject poverty and into the middle/upper-middle class tend to have gotten almost no help - financial, emotional, developmental... - from their parents. They see very clearly that they would have been wildly better off if they were put in something like foster care, and that growing up in such environments is not a *hard* barrier to success. Such people are highly competent, and will always advocate for a system of absolute meritocracy no matter what.
To such a person, any form of nepotism - however mild - is detestable. That guy who hires his retarded cousin to manage HR, that guy who wastes his life because he got a sizeable trust fund...such things, everyone hates. However, they become aware that "most" people had access to serious advantages that you didn't have - healthy food, study environments at home that were quiet, advice from parents, money to help buy a home... - and they identify these things (correctly) as barriers towards a true meritocracy.
The truest form of meritocracy, to such a person, is one where children are taken away from their parents, put into government-run foster homes, fed by the government, and given equal access to education. Children are left largely to fend for themselves, and...such people see nothing wrong with that, because it is better than the environment that they themselves grew up in: they want to build a better future for the next generation than the one they had, and this future looks better to them than what they had.
Naturally, in such a system, there is no need to pass down wealth to children: the 100% inheritance tax only makes sense there.