It is to laugh at Ritchie:
The absence of unionised collective bargaining in far too many UK sectors is a market failure
Nope. Unionised collective bargaining might correct a market outcome in a manner that some will approve of. But the absence isn’t a market failure. No more than the absence of monoposonist employers is a market failure.
Think through what unionised collective bargaining is: it’s the active collusion of suppliers to charge monopolistic prices for their output. The absence of this is not a market failure. It can be all sorts of other things but not a market failure, just no way.