This is a nonsensical understanding of employment! The reason there are unemployed people is a combination of transit times (if you lose your job as a programmer tomorrow you don't want to be allocated to a job as a hairdresser just because that was the next slot that opened up temporarily) and because some people would like to work at a specific job but can't get one right now, and would rather live off savings or welfare for a while rather than compromise (e.g. jobbing actors).

Attempts at full employment were tried, it resulted in dead economies. This stuff is basic!