Are you saying you meet few people who 'manage' their hours to maximise benefits for minimum work?
God no but they are people working and manipulating the child tax credit system who would largely be single Mums. TBH I have little issue with "subsidising" them to enable them to bemothers as well. That scenario is a common one for sure.
I have no idea what % of claimants this is tbh have you?
I suspect the system broadly works for the vast majority but still believe giving something back for benefits received would be better than not. Do you disagree?
It all depends what the something back is as I understand they agree to actively seek employment. do x number of activities per week in order to prove it. You want something more as well?
Perhaps insisting on one day per week doing activities and letting folk choose may be acceptable as I think voluntary work is a win win for both. However it is essentially inevitable that this will have an impact on employment levels and the issue would be how much.
When it is state enforced i suspect we would need to involve the private sector to get 2 millionish folk doing something at least once per week never mind 5 days per week.