Well so is the idea of employing people but not paying them minimum wage or giving the sick or holiday pay. They are the basics we have grown to expect in this country and if you work for a company for more than a certain amount of time, you should expect those basic things.
Part of the Uber story is that they don't just seem to be about growing a massive company very rapidly on the backs of cheap labour, but that appears to be an ideological reason that motivates their bosses. The now disgraced Kavalnick, who started it, has made no secret of his loathing for labour laws and indeed any control city authorities attempt to extend over their localities. To the Uber (and other Big Digital) management, rules are things that get in the way of their rightful Libertarian extremist domination of the planet.
Uber are also deeply in bed with Goldman Sachs globally and the latter shares that ideology and is clearly intent on lowering planetary wages to increase speculative and unearned profits.