You've got your answer and made your booking so I shouldn't really reply to this but the tipping comment above made me want to speak out...
If your driver is not the owner of the car, and they give good service, please tip generously.
You are going to be with this person day after day for two weeks. I know from experience, a good relationship with your driver can make or break your adventure. Your driver is responsible for your person and your goods and the safety and security of the car 24/7 while you are together. If they are good, they will save you a million small hassles by helping you buy things, helping you bargain, helping you avoid inquisitive police at security stops, helping you choose where to stop, sleep, eat, drink... They should be able to answer basic questions about the route that you are travelling. I can promise you, they will be earning very very little and it is often really strenuous for drivers. When they check you into your hotel, if that place doesn't offer drivers / guides accommodation or security for the car, they will often have to sleep in the car. They will have a tiny and I mean tiny budget from the car owner for their own meals, and they often will go without meals while they wait in the car for you to eat in your restaurant. They often may not have access to a shower or other facilities... On the road for two weeks will also mean that by default, you will to a certain extent become companions.
I like to aim for around more or less 5% for good service here, so your two week hire budget of 700 euros means a tip of around 35 euros. I always suggest to people that they have a short debrief with the people they work with at the end of the trip, point out politely what was good and what could have been better, and explain all of that politely and with kindness, when offering the tip.
What cruel wealthy people pay their staff is totally irrelevant in a discussion about prices and good fomba (behaviour) for a tourist.
Two weeks on the road in Madagascar is going to be a splendid time, you'll have a ball, wishing you all the best for a lovely trip :)