Money is a social construct, and it seems you are starting from the base assumption that wealth can be transferred infinitely and unrestricted between generations. Not everyone holds that view of money.
Money and wealth, though often used interchangeably, are very different things. Money is one form of wealth. So whilst you are correct, it’s not the point you’re trying to make.
Wealth is absolutely not a social construct and never has been.
Isn't that the idea behind a nation or any other governance structure? The wealth built within the entity can be transferred infinitely and unrestricted between generations?
What's the difference if the structure is a government, religion, guild, corporation, cartel, mafia, family or Mars colony?