No, it's the opposite - especially in local government as it's easier to infiltrate. You could use Andy Preston as an example. He's spent a lot of his own money because he wanted to be mayor of Middlesbrough. That same amount of money or even ten or fifty times as much probably wouldn't be enough to get in Westminster. But why is he doing it? To help Middlesbrough - a town he wouldn't live in or send his children to school in? What does he get out of it? Especially when he and his associates have many personal commercial interests within the area.Being tied to political party like labour or Tory may influence peoples decision making. Unfortunately local politics are just a pound shop version of westminister.
Any organisation is going to involve collective decision making and agreement if it is to function properly. Arguments are won and lost in a collective and transparent manner. Political parties have codes of conduct and standards to abide by. Independents don't have this, they could be literally getting paid by anyone or doing anyone's bidding. Of course, it can happen with political parties, but the collective aspect with rules and regulations that have evolved over time make it much more difficult.