So, based on this chart, only migrants from "MENAPT" countries are a net negative in terms of contributions irrespective of age?
It's difficult to evaluate on others.
For example "other non-western immigrants" are net positive during their work years, but net negative in their ols age. But people typically don't become migrants in their 70s, they become migrants mostly during work years.
This chart is bad for multiple reasons. It does not separate migrants by type of visa - are they on some sort of critical skills visa? Are they undocumented? It doesn't say.
It also does not indicate the proportions. If 99% of migrants are on their working years and only 1% of migrants in their old age, then in general it is a net positive even if some are a strain on welfare.
Any evaluation on migrants that don't account for the type of migration going on is very flawed. Are we talking about refugees? engineers? medical doctors? nurses? academic researchers? low-skilled undocumented migrants?
All of those will be dramatically different in terms of how they integrate into society, how they contribute to the welfare state, how mucch they pay in the taxes, etc.
Painting it with broad strokes sound to me way too much like fear mongering.
At least the excerpt of the article you linked say that people fear that, but does not provide any numbers to say that this fear makes sense or not.