[smcl]

> That adds a risk to every new hire

Which is why many countries which have this allow for few months of probation (three months in Czechia) at the start of employment, where either employee or employer can call it off at any time. There are processes by which an employer can fire an employee after this period (failed performance improvement period, and often severance) or where an employee can leave (resignation effective after a contractually required notice period, or earlier on mutual agreement).

It would take a particular sort of person and probably a special contract for a situation where someone is able to resist being fired for an extended period of time. Most people aren't quite motivated or shameless enough to keep that up for long - it's probably the same sort of effort as actually doing the job.