It would be funny if it wasn't so messed up:
[Boris Johnson] suggested that Britain should take its time before entering separation proceedings with Brussels, and he gave no details about when he would want to start the process. And the vision he sketched out — of a Britain that is still in a trading bloc with Europe — seemed at best difficult to achieve, since the price of membership in the single market has always been the two things the Leave movement explicitly campaigned against: free movement of European citizens across borders and contributions to the bloc’s operating budget.
via www.nytimes.com
For example, I want a nice vacation but I don't want to pay for it. So I think that I'll vote "leave" (on a trip, get it?) and the costs will magically go away while the benefits remain. Easy!
Note: Everyone going to IIFET from places other than the UK might enjoy a price decrease.