Any evidence to this?
Even here on MN there are regular threads when people want to stop working to move on benefits, or reduce their hours to get top ups.
There are 2.6m more disability claimants in the last six years, miraculous coincidence with time when benefit cap was introduced but disabilities were excluded from such cap. Esp given that you need to state the impact of said disability to qualify, not to bring any objective tests, e.g. MRI, CT etc, to prove.
The problem with attraction passes is the same as with taxation for benefits - these businesses expect to get certain profit, so they set up prices in such way that full ticket prices subsidise reduced ones. So you pay your tax first to pay for their living and then charged extra in terms of ticket cost to give them entertainment.
Holiday in Scotland example is great, it was funded by charity. It should be like this and people should have a choice to donate to such charities or not.