These include the reversal of cuts to the work allowance, worth around £3bn a year, and ending the benefits freeze a year early.
Vince said: "The problems stem from conflicting objectives: providing minimum family income; providing incentives to work; simplification; and saving money. Simplification, saving money and work incentives have taken precedence over the first, crucial, priority.
"Practical problems have been ignored creating real hardship, payment delays in the switchover, penalties for the self-employed; use of a single bank account for divided families; barriers to work from lack of childcare; monthly payments for those on weekly or casual wages; technical complexities in establishing online payment; and the use of Universal Credit to facilitate debt collection...
"[But] the fact that UC is becoming loathed and is being implemented incompetently and harshly does not invalidate the reasoning behind it. I strongly repudiate the Labour Party's suggestion that Universal Credit should be scrapped without being clear what the replacement is: a classic case of soundbites taking precedence over thought-through policies ."