What's the advantages of hiring as employee instead of long-term contractor? For the latter case, you can just allocate annual budget in raw USDs equal to the

What's the advantages of hiring as employee instead of long-term contractor? For the latter case, you can just allocate annual budget in raw USDs equal to the total compensation, and let the contractor send invoices for each month. So e.g. if the base salary is 100K that would probably mean ~200K total compensation. So the contractor gets raw 200K USD and she will manage all of her insurance/tax/pension/massage spendings.