Should I stick with an SARL?

I moved from Australia 3 years ago and work on my own, representing a company based in the US - and I cover Europe, Africa, Australia and SE Asia.  I was doing exactly the same when we lived in Australia (where I had a lot more disposable income - and hence this post!).  All our products are invoiced and delivered from the US and I look after our existing customers - and find new business.  I receive a generous monthly retainer - from which I pay myself a salary and cover basic day to day expenses (working from home).  Any extra travel away from home base is reimbursed by the company in the US. When I got here I was advised to set up an SARL - with myself as sole share holder, owner and gerant.  This is what I did.  What bothers me is that despite receiving a generous (fixed) monthly retainer - by the time social charges, the bank (bank fees are far higher higher than in Aus), the accountant and the lawyer (annual management report) have had their slice, there is not much left to cover both my salary - and my monthly expenses.  The SARL structure seems to me to be a complicated and expensive structure for what is essentially a very simple business - with one client, one manager, one employee and one share holder.  Obviously the biggest slice out of my income is the social charges - which gets whipped out of account on the 5th of every month, come what may.  I am just wondering if there is a more efficient way to do all of this?