a tanker can still make +250k a week in a top league without showing any effort..
Unfortunately this is not true. Tanker can make even 480k per week profit.
I promoted last year to highest division. I had no chance to win title, I decided to focus on training.
I made every week over 600k profit. Now the salary limit in our highest division is something about 120k, so now "only" 480k can be weekly profit....
And yes, I agree, this is not sufficient at all to stop tanking. Salary limit should be 60-75% of average salaries or so to influence on tanking.
However I have nothing against tanking, it just one short term tactic to get some money.