3r1st0w4eva,
They will never cancel your return ticket home, that would defeat the object ! Unless the T & Cs have dramatically changed since I left you're on a 60 or 90 day contract. Sick pay and it's duration are at the discretion of the company. You don't have a leg to stand on if they want you gone, but if they don't you're completely secure.
Having said that, it's a simple issue; supply and demand. Currently there is a plentiful supply and dwindling demand
NEO