English players do have a problem with discipline. Ben Stokes was involved in a brutal fist-fight in the city of Bristol, which left at least one individual severely injured. And yesterday, county cricketer Alex Hepburn was jailed for 5 years for sexual assault. These guys need to learn a few lessons from the old generation players, who were known for their gentlemanly behavior.
I don't know about Alex Hepburn but if that is true case then he has been treated the same way a normal English would have been treated.
I didn't meant to generalize the English players. And indiscipline is an issue not just with the English team, but with the other teams as well. As JSRAW pointed out, a few months ago Hardik and Rahul got two match suspensions for their motormouths. I have a feeling that at least some of the players are getting arrogant as a result of receiving too much wealth.
Based on what I have observed, majority of the players are disciplined while a few are indisciplined compared to a sport like Soccer where its usually the reverse.