I bet the guy on the US 100 dollar bill is also spinning in his grave. But for different reasons.

As for going after the lower level guys.
The fat cats were milking other fat cats.
It is all the little lower level guys that make life difficult for the guy on the street, and expensive for those on low incomes.
It would be nice to think of an egalitarian round up (tigers as well as flies), but most people are plagues by flies, and are unaffected by tigers.

There are a lot of restaurants in our area. It used to be that there was congestion caused by cars parked at the side of the road. This was most nights of the week. Some places had exotic dishes and high prices.
Now the roads are clear except for festivals, and prices even a middle income family can afford.
You can draw your own conclussions.

Talking of construction. One solution is to build a new town from the ground up the adequate infrastructure. This was done in Dali and oops, Chenggong. Shanghai has also built a number of satellite cities/towns.

The accumulated debris is a problem and not all of it is trash, a lot of it is leaves, twigs, and dust/dirt. Often this can not be effectively dealt with until it accumulate. You can have teams going around clearing culverts and grids, but not every bit of debri that could potentially reach the culvert.
This is a universal problem.

There is the same problem in Shanghai and Beijing, the drains are not up to coping with the heavy rains, even though they come yearly.

Urban planning is often about sprawl, without the effort to upgrade the old infrastructure. The norm is to jus connect the new drains to the old. The new drains may even have sufficient capacity, but there is a bottle neck as water reaches the old drains. Until there is the political will to dig up and replace the drains in the older parts of the city (costly and very disruptive to local residents, traffic, and business) we will continue to see occastional flooding. It used to the be same in many towns in the west.