Why is it that most of leftists support lax border control and immigration policies while the right / conservative support the opposite?
Such trend in West politics seems quite illogical - after all the left is for more welfare and the right usually not. Isn't it obvious that the more benefits you provide to residents the stricter entry restrictions you have to apply in order to reduce further waste of national resource, a number of them already having to be allocated to those who can never repay it (e.g. poor elders, serious long term illness or forever unemployed due to minimum salary, etc)? The benefits are, whether they're labeled as essential human right or not, privileges that have to be paid by residents in the form of tax.
It doesn't make sense for the right to support stricter control either - if they have their way, there would be little negative impact if any since the state provides only basic functions - anyone who join would have to integrate and work, like a slave if they have to, because there would be zero support from the government (imagine refugee camps as sweatshops). A 18th century US wouldn't need to block potential immigrants at all.
Am I misunderstanding something here? Or the parties today are completely guided by ideologies with no regard to logic?