It's literally the definition of a slippery slope argument.
> A slippery slope argument (SSA), in logic, critical thinking, political rhetoric, and caselaw, is an argument in which a party asserts that a relatively small first step leads to a chain of related events culminating in some significant (usually negative) effect.
Small first step => significant negative effect
"centrally managed, and cryptographically-backed state identification cards, complete with RFID" => everything the parent commenter said, basically
Except it is. The slope is always slippery. Nobody can predict with 100% certainty what the future holds and if you believe otherwise, then I have a bridge to sell you.
Also, you clearly don’t understand what it means if you are nitpicking about the size of the first step. The whole point is that it builds up, and nobody can truly predict how it would shape up.
Trying to do so to fit a doom and gloom narrative is, once again, the literal definition. Just because you’d not like it doesn’t suddenly make it not so.
> A slippery slope argument (SSA), in logic, critical thinking, political rhetoric, and caselaw, is an argument in which a party asserts that a relatively small first step leads to a chain of related events culminating in some significant (usually negative) effect.
Small first step => significant negative effect
"centrally managed, and cryptographically-backed state identification cards, complete with RFID" => everything the parent commenter said, basically