I imagine one of the greatest joys for Nordeus is seeing a team spend 20 dollars/euros/pounds/roubles/whatever in an attempt to match the quality of a team that tanked the previous season.
Think about it. Most players will not know wtf they have done to deserve a draw against a team 20/40/60% better than them between levels 1 and 12. So what they going to do to combat the quality difference?
Ignorance is bliss, but it's no excuse.
Tanking encourages those without the information to spend.