Thomas,
I'm sorry you felt your time was wasted.

Yes, many immigrants who experience poverty in their first few years in Canada do move out of that position.  But who pays for the chronically poor, i.e., those whose  income is less than the poverty cut-off for five or more consecutive years? 

The StatsCan report shows that, in 2012, 12.3% of immigrants (recent or otherwise) were in this category compared to 3.7% for non-immigrants.  Those are the latest numbers available.  The study also states that the highest rates of chronic unemployment among immigrants are in the GTA, Vancouver and Montreal.

"Historical" immigration was into a different economy than today's.  Tech change may very well eliminate the need for as many "workers" as in the past.  So why bring in more people?

The onus is on those who support high immigration to produce better evidence that this is a net economic benefit for Canadians.  Without that evidence, it is rational to be skeptical of the policy.  Why gamble?