The first benefits cap to £26k (£34k of pre tax income for we full time working tax payers) has been in operation for some time. Here is a link to a report on it www.gov.uk/government/uploads/system/uploads/attachment_data/file/386198/rr894-post-implementation-effects-of-benefit-cap-wave-2.pdf
and www.gov.uk/government/news/benefit-cap-200-people-into-work-or-off-housing-benefit-every-week
55,500 households so far affected by the higher cap of which 40% have moved into work.
"The policy was introduced in April 2013 and most recent estimates suggest that it will save almost £225 million over 2 years.
Over 55,000 households have had their benefits capped and, of these, almost 3 in 5 households are no longer subject to the cap.
Before the benefit cap, 300 of the highest claiming families got over £9 million in benefits every year.
Recent research published showed that the cap is motivating people to find work. For example:
those who would be impacted by the cap are 41% more likely to go into work than a similar group who fall just below the cap’s level, but this trend didn’t exist before the cap was in place – indeed those with higher weekly benefit used to be less likely to move into work
38% of those capped said they were doing more to find work, a third were submitting more applications and 1 in 5 went to more interviews
where households said they intended to seek work because of the cap in February 2014 (45%), by August the vast majority of them (85%) had done so
2 in 5 (40%) of those who said they had looked for work because of the cap in February actually entered employment by August"...
"To increase the incentives for claimants to move into work, households where someone is entitled to a Working Tax Credit are exempt from the benefit cap.
All households with someone, including a child, in receipt of a disability-related benefit are also exempt from the benefit cap recognising the extra costs disability can bring".