They asked him to give evidence, he agreed. He was originally asked last year, but declined to do so.
The committee could have chosen to find him in contempt of Parliament if he had continued to refuse to appear.
The committee are investigating the culture at his company, they have more scope than HMRC, who can check into whether staff are paid NMW, but can't do anything about people being afraid to take time off sick when they desperately need to for fear of losing their jobs.
It is largely the same as when the Culture Select Committee hauled Rupert Murdoch before them to explain how he, much like Mr Ashley yesterday, was paid an awful lot of money for running a company where he didn't appear to know what was going on. Or the questioning of those involved in the shambled which is the demise of BHS, which is starting today.
If you know of another company being run in a similar manner as either SportsDirect, BHS or News Int, you can ask your MP to bring it up with the relevant committee, so they can consider if they wish to look into it.
The committees can then use the evidence they obtain from such hearings to decide if the laws they make need to be changed, which would seem to be fairly clearly their remit.