OT #7, of course there is inference of contract, but once again, I guess it depends on your target audience/country.
I know I personally have been downsized, right-sized (or that lovely French (Canadian) term: rationaliser) twice - the work was outsourced instead; we have 'laws' to protect workers, but they are not necessarily part of a company contract, implied or otherwise. For example, in some jobs, like retail, you get laid off.... and you're out of a job. Period. I think they have to give you 4% of what you earned in the year as "vacation pay".
I worked in the financial services industry, so I believe the law says 1 week of pay for every year worked (for many other industries as well). Both my employers chose to go way beyond that. I received very decent severance, and actually went back to work for one on a 'contract'. (there are also laws about wrongful dismissal, constructive dismissal, etc. etc.)
But no, I never had a 'contract' as such as a permanent employee. There was likely inference, but still .... OT done