Getting a job right after your PhD is by definition an entry level job — it will be a first one (and it will pay poorly, unless you are going to quant finance —

Getting a job right after your PhD is by definition an entry level job — it will be a first one (and it will pay poorly, unless you are going to quant finance — and you can go there without a PhD too). So getting a PhD to get a better job makes nearly zero sense. You only need one if you plan to stay in the academia (I do, but it will be extremely hard).