IMHO, the issue is completely about citizenship — and applies to any nation.
There may be instances where your argument about taxation and representation applies at the local level — but, not nationally.
If representation for tax-paying illegal immigrants — what about illegal immigrants who don’t pay taxes? If you have to pay a tax to get representation, what about those citizens who don’t pay taxes? Isn’t representation a birthright for citizens?
Put another way — how much does an American [or other nation’s] citizenship cost? What level of tax-paying (price) should entitle one to representation?
Clearly, citizenship is a thing apart from taxes paid.
Thank you my good FRiend!
Leaving aside the taxation issue for now, I also think it's about more than the non-citizens.
Communities that have lots of illegal immigrants through no fault of their own (immigration control is a federal responsibility, after all) need to provide services - roads, police, fire, etc. to all the residents.
That means they need representation to lobby and legislate for resources.
It isn't just about the illegals, it's about the larger communities in which they live.