Yes, but also not just corruption.

The rich can throw their economic weight around in a number of ways.

For example, an employer of 10-50-100k people could say that if certain laws get passed, they'll simply... stop operating in the country, because losing said operations isn't as much a loss than what those new laws introduce.

And politicians do have to consider the livelihood of those people. It's not like a new company will pop up and buy all the equipment, hire those people, and provide economic stability for 10-100 thousand families. The company leaving doesn't just mean a drop in tax revenue, but also now up to 500k people are destitute and require government support to survive.