Margaret Hodge, who chairs the committee, has accused the DWP of making "poor decisions" at "considerable cost" to the taxpayer.
The report found that the department's decisions were overturned in nearly 40 per cent of appeals, and that Citizens' Advice had recorded a more than 80 per cent rise in the number of people asking for support on appeals in the last year alone.
More top news
Find out what to expect from the weather if you are running in the big race in London or watching from the sidelines.
It will be a soggy start to the weekend and temperatures will drop making it feel colder than in recent days.
A British couple with a combined age of 194 are to become the world's oldest newlyweds when they marry in the summer.