Currently, GOV.UK Verify asks for proof of a persons identity - this is rightly an in-depth process. However not all services need this, and it's against guidelines to ask for data that's not actually necessary for a service. So a good alternative for now might be to use 'passwordless' accounts that send a time-limited token to a user's email address, as used by services including Slack and Medium. We would need to check this is compatible with government security policy.
Can you explain why you think it is bad? I guess both words are vague, which isn't great. System is vague too I guess. The intention of using simple language like 'thing' or 'something' to describe a service, is to try stop services being described using jargon . Harder to hide a bullshit, non-service when forced to use plain English
Absolutely agree it should be plain english and non-jargon. I just think that "something" is too vague. A system is a process which takes an input, and returns an output. Adding that to the definition (for me at least) makes it a less abstract concept, and immediately gives it constraints. (i.e Is your thing a service? => Is your thing a system? => Does your thing have inputs and outputs?)