For the company that is famous all over for being so greedy, even a sum over 60.000 euro per year extra would be a very attractive piece of pie to swallow. Besides, they keep accumulated salary for months, not only 10 days delayed sum payable.
Apart from that, they have kind of high liquidity themselves, for the business expansion, keeping the money to their bank accounts. Giving them opportunity to qualify for lower mortgages or common loan rates. Getting the prime loan nowadays seems very unlikely, if you don't have the liquidity banks seek from their clients.
This all is legal, at least in Cyprus. Little pawns like crew managers don't and should not know how this system works.
And they do keep their clients satisfied. Just one thing more - seamen are not their clients.