He should spend the money sacking the HomeOffice teams and replacing them with actually competent people that can process claims quickly and efficiently.
Exactly, if their claims were processed faster and more competently (i.e. with very low likelihood of successful appeal), then the ones who are not genuine asylum seekers can be deported legally and quickly, which is surely a greater deterrent than the Rwanda scheme.
A competent government is not actually a hard thing to achieve. The problem is you're assuming that the Conservatives are just incompetent, and while a great deal of them are, the issue is far more that they just don't want to process the asylums. They want this to be a problem, that way they can rail against the evil terrible foreign people which is what they think their voter base wants.
This is a Conservative manufactured problem. They have no interest in processing asylums quickly, being slow and ineffective is the intention. It's not a failing.
It's more than that in the UK, unfortunately. Suella Braverman's father ran British concentration camps in Kenya, she's trying to restart the family business (funded entirely by the taxpayer), the reason they haven't been processing people is simply so they have enough occupants for their new camps.
if you think that the UK government has a right to try and determine if an asylum claim is "genuine" and if making deportation more efficient is a goal then "naïve" maybe, "lefty" not by any meaningful standard
The majority of the civil service don't support those policies. It's not their fault that every now and then some crazy unelected "CEO" comes along and tells the directorate "now do this".
In the last ten years the Home Secretary changed eight times!
Most civil servants are good (for government workers) but the Home Office has been stacked with people by all the vile Home Secretaries the Tories have had over the last 14 years. Sacking them is prudent.