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Is it really that great of a problem? Our population is quite low, and our birth rate is only 1.7/1.8 which is below replacement, without net migration, we'd have a shrinking population..
Humans are not salmon. we don't give birth and die, thereby leaving our offspring to maintain the species.
if our birthrate is 1.8 that makes 3.8 units of population for every breeding pair in the first generation.
as a generation span is generally defined by the length of time between average first births and currently new mothers are around 29, that means that every 29 years the 3.8 units of pupulation becomes 5.6 units, assuming the birthrate stays stagnant.
so as humans are clearly not the afore mentioned andromous salmonidae, a birthrate of 1.8 clearly does not mean we will have a population reducing in number in the short term.
so: if a country cannot create enough primary needs for its populace, see water and food, shelter etc as well as gainful employment, then any increase in population will stretch that ability further.
and, if an increasing population, adds to the degradation of national identity, and puts increased strain on the physical environment then,
Yes, an increase in population through migration is a problem.
As far as Kiwi's go, seriously, if kiwi guys come here and marry our chicks count yourself lucky, you just may have dodged a bullet...
Nice one Jono, your posts are always well thought out.