Classic "Republican" playbook: instead of killing a govt agency/service directly, slowly de-fund it over years until it's crippled, then use said crippled state as "you see, the state just can't provide healthcare/telecom/infrastructure efficiently, it must be privatized" justification, then deliver the remainders on a silver platter for the ultra rich to siphon the profits off.
Not clear what their plan is in this case though. You can't exactly privatize gov tax collection at least not in a way that wouldn't result in billions of dollars for fraud and even more lost revenue.
