 Complete the following phrase:  Alongside the noticeable change in fortunes on the Eastern Front, a main motivator for all post-1943 changes, noted by various historians, was the manifold ficial opportunity of Jewish survival. Wealthier Jews were ficially extorted in order to avoid community work and deportation, and the work of some professionals was harnessed by the public sector, and even by the Army. From the beginning, the regime had excepted from deportations some Jews who were experts in fields such as forestry and chemistry, and some others were even allowed to return despite antisemitic protests in their home provinces. Economic exploitation was institutionalized in late 1941-early 1942, with the creation of a Central Jewish Office. Supervised by Commissioner Radu Lecca and formally led by the Jewish intellectuals Nandor Gingold and Henric Streitman, it collected funds which were in part redirected toward Maria Antonescus charities. Small numbers of Romanian Jews left independently for the Palestine as early as 1941, but British opposition to Zionist plans made their transfer perilous one notorious example of this being the 