I'm in canada and there is an actual problem. I know of a lawfirm that suffered through a new hire. She had one kid, took the leave and then was pregnant with another within months of returning. The nasty part was that she made is known she intended on leaving the firm after the second kid. She did then leave. The firm effectively paid her for two years only to have her then walk out the door.

Women should get the time. I have no issue with them, and men too, taking the time. But given modern family planning, pregnancies are most often not a surprise. I don't like seeing an employee who plans and executes a multi-year campaign to extract as much money as possible from a program with the goal of then walking away once the tap runs dry.

There is no answer. Employers cannot interfere with family matters. Patents get the legally mandated leave. And they are free then to walk away. It only gets horrible when people start to leverage the program beyond the original purpose.