Guilty until proven innocent

The city of New York seems to be doing something very wrong in their attempt to stamp out Uber and others running illegal cabs.
While elsewhere illegals are given a paper slip and told to appear in court later, which most of them do not do, these poor people are subject to serious inconvenience, just to satisfy petty bureaucrats' lust for power. While the NY law is stupid and even draconian, it is the law. But the immediate impounding, I suspect, is unconstitutional because the law says innocent until proven guilty. So prove that a person is breaking the law, then you have the right to impound their vehicle. Where is the warrant signed by a judge, as required by the 4th Amendment?
And if this was one or two a year, yes, even the inspectors are human. But hundreds shows a flagrant disregard for the law.
(Full disclosure, I used Uber for the first time yesterday - not in NY ;-) - and found it to be an excellent experience, far superior and cheaper to using a cab. Wake up New York, the free market works better than all those government regulations)
http://www.dnainfo.com/new-york/20140721/long-island-city/tlc-wrongly-accused-hundreds-of-being-illegal-cabbies-past-year