Read the article and look at the concerns that the charities directly involved in mental health have. Note also the distinct lack of evidence; where are the studies quoted, for example.
And then join the dots with regard to Labour's approach to welfare, now and in its recent history, and ask yourself whether this is about supporting people with serious mental health issues or more about forcing them back to work.
The people I know with serious mental health issues need the service to be available to them, and not left to fend for themselves, hurt themselves, or hurt others, TBH.
They don't generally need a back to work conversation with an untrained adviser pushing to get them off benefits.
I'd say try a bit of humanity and think through what's really going on in those "back-to-work" interviews with seriously ill people, before taking Liz Kendall's word for it, but I get that you feel obliged to defend the party at all costs.
A Channel Four documentary has revealed the cruel nature of the UK's disability system.
citizen-network.org
Benefits claimants told i they may be forced to live 'hand-to-mouth' under the Government's policies
inews.co.uk