I keep hearing how the French benefits system is sooooooooo much more generous than ours. I have to say this is a new one on me, I even remember the mayor of Calais blaming the Calais migrant crisis on our ridiculously generous benefits system.
Of course I believe there is something in the argument that they have family already here which would make them want to come here, but let's face it, our benefits system is ridiculously generous. I've even seen migrants interviewed on the news and when asked why they want to come here the answer was 'britain...she give me house...she give me money. We come Britain for our house and money, thanks!'. I didn't make that up, I actually heard it said on the news. Also the fact that they've travelled across umpteen borders and hundreds and thousands of miles to get here is a dead give away as to why they want to come here. Like I say, I don't blame them for wanting to benefit from such generosity but this can't be allowed to keep happening. The politicians also need to take some of the blame here.

Either way this must stop now. There are plenty of countries in Europe who can take them. We're full and simply can't sustain this mass influx of people, and we must stop giving money away like this. We have people in this country who are British who need our help.

So when the residents of the Calais migrant camp are interviewed about why they want to come to England and they repeatedly give economic reasons, what you are saying is that they are all actually lying and are in fact risking their lives to come here to visit their friends instead?
The UK may or may not provide the most generous potential benefits. I honestly don’t know as I have never looked in any depth to see that other countries offer. What I can say with absolute certainty is that the perception is that Britain is the most generous country and that above all else is why these people don’t wish to stay in France or any other country they have passed through.

Well, i can't speak for what interviews you have seen but i haven't noticed that they 'repeatedly' give economic reasons although i don't deny that this is sometimes mentioned. I would say that the most common answer in interviews i've seen is that they have family/friends here.
I suggest that you do some investigating about the relative benefits from various countries and let us know what you find.
Your 'certainty' seems to me to be somewhat illogcal. If the perception was as you state then why do the vast majority of migrants stay in France or other countries within the EU. If the situation was how you claim then there really should be the 'swarm' of migrants that certain politicians have told us to be on the lookout for rather than the relatively low numbers that are threatening to 'flood us'.