Ok that one is an old favourite…and I aint buying it.
Let’s start with accomodation..
Do the French feed and clothe them, give them a phone, and put them up in luxury hotels that are closed off purposely to cater for their every need.
Supply entrrtainment, bicycles, travel passes, private health, and dentistry, 3 meals a day …all paid for by the French taxpayer? …
Because that is what the UK does, all of the above.
Check out you tube…is it Red Rose, or White Rose,.where they visit these hoteld all over the country.
Franglais tried to be clever on this, by trying to rubbish it all previously, until I shot him down in flames.
I have actually been in one of those hotels in an ‘undercover’ capacity…(Ok I’m building my part here …but I did wear my sunglasses
)
A mate who was on security, gave me a black jacket, and a lanyard, and I passed off as security while he showed me around…I was even offered a job ffs 
He has since left on a more…‘‘adventurous’’ security gig abroad, so no comeback on him,.although I knoew for a fact he wouldn’t gaf anyway.
Anyhoo the answer to those above points is a resounding …NO.
No 4 star hotels in an ‘‘all inclusive’’ capacity…just a tent, …and I aint even sure if they are supplied either.
Incentive is the key word.
Cut that incentive off and it cuts out the ‘’‘need’’ to come here.
As for your Dad I would asume he was a genuine refugee,.the tyoe of whom I have no problem with…
The majority of these young guys ate not.
They are opportunist economic migrants heading for the land of milk and honey…not a safe country, they have already left at least one…France.
As for your link…no they do not HAVE to stsy in the first dafe country.
Bit why make a perilous journey,.a costly one to boot, to an island if the benefits on the mainland are the same?
Because they soeak English?
Nah, so do most of Europe.