Also, one bad news... in the consultation, it says if u are for closing post work study, that's it. It doesn't say anything about phasing in changes...only if you select that u want changes to psw 
It does say about the time period as well, it work like that :
10. What changes do you think we should make to the Tier 1 Post Study Work route?
  What changes do you think we should make to the Tier 1 Post Study Work route? [Please note, the paper consultation document has an open-ended box for comment on this question]   Close the route entirely
  Restrict it significantly
  Other
11. Over what period of time do you think the route should be closed/restricted?
  Over what period of time do you think the route should be closed/restricted?   Immediately
  0-11 Months
  12-24 Months
  25-36 Months
  37 Months plus
  Don't know
12. Do you think access should, nonetheless, be restricted to only those awarded a PhD by a UK university? 
  Do you think access should, nonetheless, be restricted to only those awarded  a PhD by a UK university?   Yes
  No
  Don't know