The only ground meat pie with a pastry crust that I'm aware of is tortiere... No pastry in Canada either, nor does that appeal. The only ground meat pie with a pastry crust that I'm aware of is tortiere, also delicious. Pot pies generally have something chunky and stewish inside (beef or chicken).
Germany never did. East Germany became communist in 1945 when the USSR ocupied it after WW II.
Finally, in the late 1980s, East Germany, fueled by the decline of the Soviet Union, began to implement a number of liberal reforms. On November 9, 1989, masses of East and West Germans alike gathered at the Berlin Wall and began to climb over and dismantle it.