Politicians and bureaucrats are no different from the rest of us. They will maximize their incentives just like everybody else.

How would the US be different today if people coming off the boat were greeted with a welfare check instead of a shovel?

If you have an area where high-income receivers concentrate, you have a higher fiscal capacity. That fiscal capacity is a valuable resource and will create rent-seeking. People will trying to get that resource one way or the other, including immigration. It is very much like the medieval peasants putting their sheep on the commons pasture. It is better than the open range, and if you let them have open access they will, in fact, put too many sheep on the pasture and waste the value that the pasture has.

Politically, sometimes you get situations where rent control will go through. It is especially true in an emergency, where there is a sudden, sharp increase in demand for housing or a cut back in supply. People will simply not allow the marketplace to allocate housing resources and so you get pressures for rent control. Once you have it, it is hard to eliminate.

America is perhaps excessively mobile in the sense that there is sometimes not enough stability in communities. Dynamism in the economy is not necessarily the "be all and end all".

You can get a coalition of senators from particular states in America, for example, who want to construct highways or dams or ports which may well be very inefficient. The taxes would be paid by the people over the whole country, but the benefits would go to the few people in those particular locations. This type of spending is a rather gross waste of resources that worsened over the years as the government has been allowed to do more particularized things.

Once you have an equalization instrument in place, as you have in Canada, there arise tremendous bureaucratic values - bureaucratic rent so to speak - in maintaining the system that you have. To shift to a system that paid the transfers directly to individuals, by having differential rates of federal income tax levied to adjust to provincial fiscal capacities, which would be my preference, you would have huge bureaucratic opposition. People would try to protect the rents they have in the current system of institutions.