Couching this in terms of Japanese culture is unhelpful in my opinion. The return gifts probably wouldn't exist in the first place elsewhere, but allowing them is simply a blatant loophole that various local governments have cynically abused to increase their revenue and this is something that would happen in any country.
The biggest problem is that some local governments are apparently giving return gifts that have a value that's higher than the 2000 yen part of the hometown tax that isn't tax deductible, which means that by opting in to donating to these local governments you do slightly better than if you didn't donate money in the first place. These governments are obviously trying to get people with absolutely no local connection to send money purely for the gifts.
One option would be to set a limit on the value of the gifts, but there's absolutely zero reason to allow the return gifts in the first place. The whole reason for the first 2000 yen not being tax deductible is this is something you are only supposed to do if you seriously want your money to go to a local government, and allowing non-taxed return gifts defeats the intention of how the system is set up. Having tax money go back into return gifts is also ridiculously inefficient.
Unfortunately, based on the way the government is set up, rural votes have disproportionate power, and for this reason the LDP has a tendency to pander to rural interests, so they probably have no interest in eliminating the gifts entirely. However, at least they recently announced that they are looking into introducing legislation to limit the value of gifts (and ban the worst abusers from participating entirely) in the next regular session of the Diet.
The biggest problem is that some local governments are apparently giving return gifts that have a value that's higher than the 2000 yen part of the hometown tax that isn't tax deductible, which means that by opting in to donating to these local governments you do slightly better than if you didn't donate money in the first place. These governments are obviously trying to get people with absolutely no local connection to send money purely for the gifts.
One option would be to set a limit on the value of the gifts, but there's absolutely zero reason to allow the return gifts in the first place. The whole reason for the first 2000 yen not being tax deductible is this is something you are only supposed to do if you seriously want your money to go to a local government, and allowing non-taxed return gifts defeats the intention of how the system is set up. Having tax money go back into return gifts is also ridiculously inefficient.
Unfortunately, based on the way the government is set up, rural votes have disproportionate power, and for this reason the LDP has a tendency to pander to rural interests, so they probably have no interest in eliminating the gifts entirely. However, at least they recently announced that they are looking into introducing legislation to limit the value of gifts (and ban the worst abusers from participating entirely) in the next regular session of the Diet.