The problem of greedy employers firing and rehiring staff on worse terms has been about for a long time.
This was in part mitigated by TUPE, in part by Employment Tribunals, and in part by Trade Unions.
One can argue that the run down of the role of Employment tribunals has made the problem worse.
I notice an absence of claims that this would all have been prevented by EU law if the UK had remained formally in the EU.
I notice a lack of defence of the current governments position.