That phrase 'disciplining poor people' is 100% it.
The idea is, you wait six weeks for money, you can't pay your bills, you panic, you take any job you can possibly get, hey presto you're employed and isn't that better for you. Aren't you glad we made you that stressed?
That is literally the logic.
And if you're working part time and still getting UC, it won't really be enough (not as much as you'd've got before) but it's more than you'd have if you were unemployed so that's still motivation to work and if you want a better wage work more.
Unfortuantely that one complete misses the idea that there are COSTS to having a job, eg childcare fees above what you can get funded, transport costs (especially if you have to run a car) etc which can still mean it's not financially viable to work without a significant credit to go with your wages.
I don't want to say, we bloody told you so. But this was ALL in the welfare reform bill from 2011 and people on MN and loads of other people tried to get the word out, and no one would fucking listen. Even the left wing papers weren't interested in printing stories about it most of the time.
Please, please, email or write to your MP and tell them that you're worried and what are they going to do (not just for specific families but for everyone).